This guide assumes you have read and are familiar with the basics of text-based files in NeoLemmix.Please note: This guide is written for V12.11.X.A custom style in NeoLemmix can consist of several components - terrain pieces, interactive objects, backgrounds, custom lemming sprites, and a "theme".
Each style exists inside its own folder in "styles". Please note -
it is a VERY strong convention, that you should start your style's names with your own username, eg. "namida_bridge". The only exceptions that exist and have been accepted into the NeoLemmix styles are those from the official games (most of which are instead prefixed with the
game they're from), plus "default" and "examples" which are obvious special cases. Within a style's folder, there will usually be a "theme.nxmi" file, and subfolders for each type of content.
It is also recommended that all your style / piece names be all-lowercase, and consist only of alphanumeric characters and underscores. In particular, uppercase letters and spaces should be avoided.All images should be PNG files. No other formats are supported.
theme.nxmiThe theme.nxmi file defines a color scheme, as well as which lemming sprites to use, for levels that use this style as their theme. The theme.nxmi file is placed in the base folder of the style.
LEMMINGS - Specifies the style name to use the lemming sprites of. If the style has its own lemming sprites, usually, you'd use this style's name. Eg.
LEMMINGS xmas would use the sprites from the "xmas" style.
All colors are specified using their name as the keyword, and an RGB color as the value. Remember, hex values should be prefixed with x, so for example, for R:255, G:128, B:64 you'd enter "xFF8040". (Without the quotes, of course.) The following are values used either by NeoLemmix itself, or by the objects in the "default" style. Custom objects may use completely custom names for colors - they "just work".
MASK - Specifies the color used for masking in lemming sprites (mostly, for destruction particles), as well as the bricks from constructive skills.
MINIMAP - Specifies the color used for the low-quality minimap.
BACKGROUND - Specifies the color for level backgrounds, when no background image is used.
ONE_WAYS - Specifies the color one-way arrows will be recolored to (applies to default style one-way arrows only)
PICKUP_BORDER - Specifies the color used for the outline of pickup skills (applies to default style pickup skills only)
PICKUP_INSIDE - Specifies the color used for the inside of pickup skills (applies to default style pickup skills only)
If the lemming sprites you are using support recoloring (both Default and Xmas do), you may want to specify the colors for this too. If you are using recoloring with custom colors, you will need to check the spriteset's "scheme.nxmi" file to figure out the color names it uses. For the official styles, the names are listed below. You specify the colors for these names in exactly the same way as the above colors - in the same $COLORS section, not a second one.
LEMMING_HAIR
LEMMING_CLOTHES
LEMMING_SKIN
LEMMING_BUILDER_SACK
LEMMING_UMBRELLA
LEMMING_ZOMBIE_SKIN
LEMMING_ATHLETE_HAIR
LEMMING_ATHLETE_CLOTHES
LEMMING_NEUTRAL_CLOTHES
LEMMING_SELECTED_CLOTHES
LEMMING_CLOTHES
LEMMING_HAT_TIP
LEMMING_SKIN
LEMMING_BUILDER_SACK
LEMMING_UMBRELLA
LEMMING_ZOMBIE_SKIN
LEMMING_ATHLETE_HAT_TIP
LEMMING_ATHLETE_CLOTHES
LEMMING_NEUTRAL_CLOTHES
LEMMING_SELECTED_CLOTHES
BackgroundsBackgrounds are very simple - place image files in a "backgrounds" folder, and they're good to go. That's really it.
You may optionally provide a matchingly-named .nxmb file. For example, a background "sky.png" might have a corresponding "sky.nxmb" file.
Currently the only line that is supported in an NXMB file is:
DEPRECATED - No value needed; marks the piece as deprecated. This means that, by default, the piece will not be visible in the editor (though there is an option to reveal deprecated pieces); it has no effect in-game.
Terrain piecesTerrain pieces are almost the same as backgrounds - get the images, put them in a "terrain" folder.
Each terrain piece may (but does not have to) have a corresponding .nxmt file. For example, a terrain piece "steel_01.png" might have a corresponding "steel_01.nxmt" file. A PNG file for terrain, without a corresponding NXMT, is treated as if the NXMT existed but was empty.
The .nxmt file can contain the following lines:
STEEL - No value needed; marks the piece as steel.
DEPRECATED - No value needed; marks the piece as deprecated. This means that, by default, the piece will not be visible in the editor (though there is an option to reveal deprecated pieces); it has no effect in-game.
RESIZE_HORIZONTAL,
RESIZE_VERTICAL,
RESIZE_BOTH - No value needed. Specifies the direction(s) in which the object can be resized. It is valid to have both "RESIZE_HORIZONTAL" and "RESIZE_VERTICAL" as separate lines, instead of using "RESIZE_BOTH".
NINE_SLICE_XXX - (Where XXX is "TOP", "LEFT", "RIGHT" or "BOTTOM") Sets the nine-slicing margin - basically, a border region that's only drawn at the edges of the object even when resized, instead of being tiled with the rest of the object - on each side of the animation. Has no effect if the object is not resizable in the relevant direction.
DEFAULT_WIDTH,
DEFAULT_HEIGHT - If the piece is resizable, this sets the initial size when placing the object in the editor. This is also used when loading a level file if the level does not specify the size - useful when changing the base size of a resizable object.
Interactive objectsObjects are a fair bit more complicated than terrains and backgrounds. Objects exist in the "objects" folder.
Each object consists of one or more PNG files, as well as a single NXMO file. Separate PNG files are used for separate animations; for multiple frames in a single animation, these are instead stored as a sprite strip - ie: a horizontal or vertical strip of equal-sized graphics, containing each animation frame.
The base name of the object comes from the NXMO file's name. Animation graphic files are named after this, with the animation name seperated from the piece name by an underscore. For example, a file "trap.nxmo" might have a corresponding animation graphic "trap_constant.png". Animations without a name - this is often the case for the primary animation - will simply match the NXMO's name, so in a file "trap.nxmo", an animation with no name specified would come from "trap.png" (not "trap_.png"!).
For the primary animations, if an object type has a single "idle" frame (for example, a triggered trap), this will be the first frame, with the rest being the animation sequence. If an object type has
two idle frames (for example, a locked exit - it has the "closed" idle frame and the "open" idle frame), the one it will generally start as, is the second frame; while the one it will generally remain as once used / activated / etc, is the first frame. In the case of a locked exit for example, the first frame is the exit when open, the second frame is the exit when closed, and the remaining frames are the opening sequence.
In the case of a splitter, the first frame is pointing right, and the second frame is pointing left.
In the case of pickup skills, the skills are in the same order as on the skill panel, and each skill has a "picked up" frame then a "not picked up" frame. However, you should rarely - if ever - make the primary animation for a pickup skill object manually. Instead, there is
a special system for pickup skill objects.
The NXMO file consists of the following lines:
General propertiesThe "EFFECT" line specifies the object's effect, and can be one of the following. Omit the EFFECT line for a no-effect object.
ENTRANCE
EXIT
LOCKEDEXIT
UNLOCKBUTTON
PICKUPSKILL
TRAP
TRAPONCE
FIRE
WATER
TELEPORTER
RECEIVER
UPDRAFT
SPLATPAD
ANTISPLATPAD
SPLITTER
ONEWAYLEFT
ONEWAYRIGHT
ONEWAYDOWN
ONEWAYUP
FORCELEFT
FORCERIGHT
BACKGROUND
,
TRIGGER_Y - Specifies either the top-left corner of the trigger area (for objects that have an area), or the coordinates of the trigger point (for objects that just have a single point, eg. entrances, receivers).
TRIGGER_WIDTH,
TRIGGER_HEIGHT - Specifies the size of the trigger area, for objects that have areas.
SOUND - Specifies the sound file to play when the object is activated.
KEY_FRAME - Specifies the "key frame". Currently, this only does anything for teleporters and receivers - it specifies the frame number at which the corresponding receiver will begin its animation, or at which the lemming will be released, respectively.
RESIZE_HORIZONTAL,
RESIZE_VERTICAL,
RESIZE_BOTH - No value needed. Specifies the direction(s) in which the object can be resized. It is valid to have both "RESIZE_HORIZONTAL" and "RESIZE_VERTICAL" as separate lines, instead of using "RESIZE_BOTH".
DEFAULT_WIDTH,
DEFAULT_HEIGHT - If the piece is resizable, this sets the initial size when placing the object in the editor. This is also used when loading a level file if the level does not specify the size - useful when changing the base size of a resizable object.
DEPRECATED - No value needed; marks the object as deprecated. This means that, by default, the object will not be visible in the editor (though there is an option to reveal deprecated pieces); it has no effect in-game.
EDITOR_CROP - Overrides the usual algorithm the editor uses to determine whether or not to crop empty space around the object. Takes a value of "true" or "false". Has no effect in-game.
For objects that have digits displayed, such as windows and exits (when the lemming count is limited) or pickup skills, the positioning of the digits can be specified as follows:
DIGIT_X and
DIGIT_Y - Specifies the position digits are displayed at. For the Y coordinate, this is the top of the digit graphic always; for the X coordinate, it may be either the left, right or middle depending on alignment.
DIGIT_ALIGN - Specifies whether to align the digits to the left (-1), middle (0) or right (+1).
DIGIT_LENGTH - Specifies the minimum number of digits to be displayed. If this is zero, digits will not be displayed at all if the value is equal to zero. For pickup skills, digits will also not be displayed if the minimum length is zero and the skill count is 1.
You can also define custom digit graphics. This is done by adding a 10-frame secondary animation, that's always hidden, called "DIGITS".
AnimationsAn object can have one or more animations, which are semi-independent of each other, and can play, stop, or even disappear based on certain conditions. The primary animation of the object is defined in a
$PRIMARY_ANIMATION section, and all others are defined in an
$ANIMATION section. These are identical, except for some keys not being useable in the primary animation.
As mentioned above, each animation should be a separate PNG file - although if there are two animations with the same graphic (differing, perhaps, by their position), it is perfectly acceptable to only have one copy, and have multiple animations refer to it (just give them the same
NAME value).
FRAMES - Specifies the number of frames in the animation.
NAME - Specifies the name of the animation. See the above explanation about filenames.
COLOR - Specifies the name of a color (from the level's theme) that will be used to recolor the animation. This is not likely to be useful outside of a few objects in the "default" style.
HORIZONTAL_STRIP - Specifies that the animation's frames are arranged horizontally. If this is absent, they're assumed to be vertical.
Z_INDEX - Specifies the front-to-back order of animations. Lower values are drawn first; ties are broken by "primary first, then in-file order after that". The Z index, if not specified, defaults to 1 for the primary animation and 0 for all other animations.
INITIAL_FRAME - Specifies the initial frame of the animation. This has no effect for the primary animation
if the object is a triggered object, but it does work for the primary animation on objects that have constant animation (eg. water, fire, etc). As well as numeric inputs, "RANDOM" is a valid value.
OFFSET_X and
OFFSET_Y - Specifies the offset from the object's position at which this animation is displayed. Can be used on the primary animation, although it seems a bit silly to do so (but maybe there's a good use case I haven't thought of).
NINE_SLICE_XXX - (Where XXX is "TOP", "LEFT", "RIGHT" or "BOTTOM") Sets the nine-slicing margin - basically, a border region that's only drawn at the edges of the object even when resized, instead of being tiled with the rest of the object - on each side of the animation. Has no effect if the object is not resizable in the relevant direction.
The remainder of this section does not apply to the primary animation, only to secondary animations.HIDE - No value needed. If present, the animation will initially be marked as "Hidden". Note that this does NOT automatically mean it won't be visible - see note below.
STATE - Specifies the initial state of the animation. Valid options are explained below. If absent, the default is either "PAUSE" (if "HIDE" is present) or "PLAY" (if not).
EDITOR_HIDE - This overrides the editor's determination of whether it should show the animation or not, and instead forces it to be hidden. Has no effect in-game.
You can then define conditions under which the animation will change state, by using
$TRIGGER sections. When no trigger section's conditions are fulfilled, the animation reverts to its default visibility and state. When multiple sections' conditions are fulfilled, the last one in the file order has priority. The contents of these sections are:
CONDITION - Specifies the condition for the trigger. Explained below.
HIDE - No value needed. If present, the animation will be marked as "Hidden" when the trigger condition is met. Note that this does NOT automatically mean it won't be visible - see note below.
STATE - Specifies the state of the animation when the trigger condition is met. Valid options are explained below. If absent, the default is either "PAUSE" (if "HIDE" is present) or "PLAY" (if not).
The following are valid values for STATE (either in the base state or in a trigger condition):
PLAY - The animation will play.
PAUSE - The animation will stop playing, and remain on the current frame.
STOP - The animation will stop playing, and revert to frame 0.
LOOPTOZERO - The animation will continue playing until it reaches frame 0, at which point it will stop playing.
MATCHPHYSICS - The animation will display whichever frame number the primary animation is currently displaying. Animations using this must have (at least) the same number of frames as the primary animation. Probably not of much use outside of the default style pickup skill object (where it's used together with COLOR, above, for recoloring purposes).
Note that HIDE will only take effect when the animation's state is PAUSE or STOP. It will also take effect on LOOPTOZERO, but only after frame 0 has been reached.
The following are valid trigger conditions:
UNCONDITIONAL - This condition always succeeds. It exists for internal technical reasons and there's rarely if ever reason to use it in an NXMO file.
READY - Succeeds when the object is able to interact (it is not busy or disabled).
BUSY - Succeeds when the object is currently doing something - like a trap killing a lemming, or an entrance in the process of opening.
DISABLED - Succeeds when the object is no longer able to interact - for example, a trap that has been disarmed.
EXHAUSTED - Succeeds when the object has been "used up" - for example, a single-use trap that has been activated (but not one that has been disarmed).
Here are some notes, taken from comments in NeoLemmix's source code, that specifically explain the interaction between the conditions and every object type. Due to the nature of them as source code comments, they may not match completely with the usual names for various object types, but it should be obvious what's what. "True" means the condition passes, "false" means it does not.
OBJECT TYPE | gatcUnconditional (no condition)
----------------|-----------------------------------
GENERAL RULE | Always true, for all objects
Anything | Always true
OBJECT TYPE | gatcReady (READY)
----------------|-----------------------------------
GENERAL RULE | The condition will be true if the object would able to interact with a lemming at this moment
DOM_EXIT | True when the exit's lemming limit has not been reached, or if the exit has no limit
DOM_TRAP | True when the trap is idle (but not disabled)
DOM_TELEPORT | True when the teleporter and its paired receiver (if any) are idle
DOM_RECEIVER | True when the receiver and its paired teleporter (if any) are idle
DOM_PICKUP | True when the skill has not been picked up
DOM_LOCKEXIT | True when the exit is fully open and the lemming limit has not been reached, or it doesn't have one
DOM_BUTTON | True when the button has not been pressed
DOM_WINDOW | True when the window is fully open, and if it has a lemming limit, hasn't yet reached it
DOM_TRAPONCE | True when the trap has not yet been triggered (or disabled)
All others | Always true
OBJECT TYPE | gatcBusy (BUSY)
----------------|-----------------------------------
GENERAL RULE | The condition will be true when the object is transitioning between states, or currently in use
DOM_TRAP | True when the trap is mid-kill
DOM_TELEPORT | True when the teleporter, or its paired receiver, are mid-operation
DOM_RECEIVER | True when the receiver, or its paired teleporter, are mid-operation
DOM_LOCKEXIT | True when the exit is in the process of opening
DOM_WINDOW | True when the window is in the process of opening
DOM_TRAPONCE | True when the trap is mid-kill
All others | Always false
OBJECT TYPE | gatcDisabled (DISABLED)
----------------|-----------------------------------
GENERAL RULE | The condition will be true when the object is unable to interact with a lemming, either permanently or
| until some external condition is fulfilled.
DOM_EXIT | True if the exit has a lemming limit and it has been reached
DOM_TRAP | True if the trap has been disabled (most likely by a disarmer)
DOM_TELEPORT | True if no receiver exists on the level
DOM_RECEIVER | True if no teleporter exists on the level
DOM_PICKUP | True if the skill has been picked up
DOM_LOCKEXIT | True while the exit is in a locked state, or if the exit has a lemming limit and it has been reached
DOM_BUTTON | True when the button has been pressed
DOM_WINDOW | True if the window has a lemming limit and it has been reached
DOM_TRAPONCE | True when the trap has been disabled (most likely by a disarmer) or used
All others | Always false
OBJECT TYPE | gatcExhausted
----------------|-----------------------------------
GENERAL RULE | True if an object with limited uses has been used up.
DOM_EXIT | True if the exit is limited-use and has zero remaining uses
DOM_PICKUP | True if the skill has been picked up
DOM_LOCKEXIT | True if the exit is limited-use and has zero remaining uses
DOM_BUTTON | True when the button has been pressed
DOM_WINDOW | True if the window is limited-use and has released all lemmings
DOM_TRAPONCE | True when the trap has been used
All others | Always false
Custom lemming spritesLemming sprites must have a PNG file for each state, as well as a "scheme.nxmi" file which sets various attributes of the lemming sprites.
A lemming sprite PNG file consists of the frames of the animation arranged vertically. The two directions are arranged horizontally; left-facing on the left, right-facing on the right (or in other words - the sprites face
away from the middle of the image). The number of frames can be arbitrary, though for certain animations it may look weird if they don't fit well with physics, so it's generally advised to use the same number of frames as the default sprites, or an integer multiple thereof. Also note that some states may have an upper limit due to physics; for example, it's pointless to give a Reacher animation more than 6 frames, as a lemming never remains a reacher for longer than that (they'll become a shimmier or faller after 6 frames at most).
Note that when a lemming first transitions into a state, animation starts from the 2nd frame (unless the animation only
has one frame).
Lemming sprites are an "all or nothing" deal - you must either provide a full set, or not provide any at all. Even if an animation is intended to be the same regardless of the lemming's direction, a separate left and right version must be included.
ascender.png
basher.png
blocker.png
bomber.png
builder.png
burner.png
climber.png
digger.png
disarmer.png
drowner.png
exiter.png
faller.png
fencer.png
floater.png
glider.png
hoister.png
jumper.png
miner.png
ohnoer.png
platformer.png
reacher.png
shimmier.png
shrugger.png
splatter.png
stacker.png
stoner.png
swimmer.png
walker.png
The scheme.nxmi follows the usual text-based format, and will have two or three sections.
This section specifies the color changes that occur based on the lemming's state (athlete, selected, zombie, neutral).
It consists of subsections with the keyword $ATHLETE, $ZOMBIE, $NEUTRAL or $SELECTED. The keyword used determines which state the recoloring applies to.
All of these sections consist of a "FROM" line and a "TO" line, both of which specify a color.
For example:
$ATHLETE
FROM xFF0000
TO x0000FF
$END
Will result in an athlete being recolored such that any pixel RGB 255,0,0 changes to RGB 0,0,255.
It is obligatory to include at least one recoloring pair for athlete and selected lemming, or else the spriteset will not be usable. Zombie and neutral recolorings must be included in order to use the spriteset on levels that include the respective types of lemmings, but the lack of them will not cause a problem on levels that do not use the respective lemming types.
This section is optional. If present, it allows certain colors of the lemming sprite to be changed depending on a level's theme. Of course, you generally wouldn't want to recolor them in the same style, but this can be useful when you want several styles to use the same lemming sprites except with different coloring.
This consists of name-color pairs. The names are arbitrary, you can use whatever you like; though of course it's reccommended to use something meaningful (eg. "LEMMING_HAIR_COLOR", rather than "XYZ" or "GREEN"). Recoloring will occur based on a match between the name here, and a name in the level's theme file's $COLORS section.
For example, if you specify "ABCDEF xFFFFFF" here, and use the lemming sprites with a theme that contains "ABCDEF xFF0000" in the $COLORS section, all pixels of the sprite colored RGB 255,255,255 will be recolored to RGB 255,0,0.
Requires NeoLemmix V12.8.0 or higher (including RC builds thereof).
This section specifies colors that are, for the purpose of the recoloring (both state-based and spriteset-based), considered to be alternate shades of the same color. For example, if you specified "dark blue" to be an alternate shade of "light blue", then recoloring could be specified for just the light blue, and NeoLemmix would automatically apply an equivalent recoloring (based on HSV) to the dark blue. This section consists purely of one or more $SHADE sub-sections:
$SHADE
PRIMARY xFF00FF
ALT xC000C0
ALT x800080
$END
This example would treat xFF00FF (RGB 255, 0, 255) as the primary color, and xC000C0 (192, 0, 192) and x800080 (128, 0, 128) as alternate shades of it. Thus - if one of the types of recoloring specified xFF00FF as a source color, then xC000C0 and x800080 would get recolored along with it, without having to specify them seperately.
The $ANIMATIONS section specifies the frame count and foot positions for each animation. This consists of a subsection for each animation. The name of the sub-section is the same as the name of the animation's PNG file, but without the ".png" extension. (eg. "$WALKER" for walker.png)
These sections contain a FRAMES line which specifies the frame count for the animation. They also contain a $LEFT and $RIGHT section. Both of these work the same way - they contain a FOOT_X and FOOT_Y line that specify the lemming's "foot" position, for each direction respectively.
The "foot position" should be one pixel below the lemming's feet (such that, if the lemming was standing on a flat surface, the foot position would be vertically overlapping with the top pixel of the surface). Horizontally, it should be as close as possible to the middle of the lemming's body (the bottom of the body, if the body is angled), part-pixels rounded towards behind the lemming if need be.
As an example,
$WALKER
FRAMES 8
$RIGHT
FOOT_X 8
FOOT_Y 10
$END
$LEFT
FOOT_X 9
FOOT_Y 10
$END
$END
This specifies that the Walker animation has 8 frames (note that this means "8 frames for facing left + 8 frames for facing right", not "4 left + 4 right"). The foot position of the right-facing graphic is 8,10; and the foot position of the left-facing graphic is 9,10.
AliasesThe "alias.nxmi" file, which is optional and can be placed in your style's base folder, specifies information about which piece names should redirect to others. For example, if you specify an alias from "style1:blah" to "style2:beep", then all instances of the piece "blah" from style1, will be replaced with the piece "beep" from style2, when the level is loaded. The usual use case for this is when pieces are moved between styles, or renamed.
The alias.nxmi file can consist of any number of sections with one of the following keywords:
- $STYLE
- $GADGET
- $TERRAIN
- $BACKGROUND
- $LEMMINGSThese sections consist of two lines, a "FROM" and a "TO". These specify the piece name to translate from and to, respectively. In the case of $STYLE and $LEMMINGS, you would specify just a style name. In the case of the other three, you must specify a style name and a piece name, for example "orig_dirt:clump_01". However, there is a shortcut here - to refer to "this style", you can leave the style name blank. To use the same example, assuming this was the alias.nxmi file inside "orig_dirt", you could shorten it to just ":clump_01" (note that the colon is still there).
If the source piece is not resizable, but the target piece is, you may want to add "WIDTH" and/or "HEIGHT" lines as well, to specify the default sizing of the piece.
No style other than "default" should ever specify an alias FROM a piece in a different style. However, it's perfectly fine for an alias to point TO a piece in a different style.
High Resolution DataBy default, all styles will attempt to use the pixel art upscaler when used in high-resolution mode. It is possible to either specify the upscaling information, or to outright provide high-resolution graphics.
Upscaling configuration is done via an "upscaling.nxmi" file in the style's base folder.
This file contains of one or more sections with one of the following keywords:
- $STYLE
- $GADGET
- $TERRAIN
- $BACKGROUND
- $LEMMINGS
$STYLE sets a default for the style; any piece-specific setting will override it. The others specify settings for one (or more) individual pieces, or in the case of $LEMMINGS, for the style's lemming sprites.
Within a section, the following lines can be specified:
LEFT_EDGE - For the purpose of upscaling, should the area beyond the left edge of the image be treated as though the piece were tiled ("TILE"; this is the default), mirrored ("MIRROR"), or as if there was just empty space beyond the piece's edge ("BLANK")?
RIGHT_EDGE, TOP_EDGE, BOTTOM_EDGE - Same, but for the other edges.
UPSCALE - Sets the upscaling algorithm to use. This can be "PIXELART" (pixel art upscaler), "RESAMPLE" (full-color upscaler), or "ZOOM" (nearest-neighbour, or in other words, just zooms the image to create a high-res sized graphic).
PIECE - (Not applicable to $STYLE or $LEMMINGS) Specifies the name of the piece to apply the settings to. A section may specify more than one PIECE line.
You can also outright provide high-resolution graphics. You do so by placing files with the same name as the low-resolution images, into folders with the same name but an "-hr" suffix. For example, for high-resolution backgrounds, you'd place these in a folder called "backgrounds-hr".
Note that you cannot ONLY provide high-resolution graphics. Every piece MUST have a low-resolution graphic; you can then optionally add a high-resolution graphic as well.A high resolution graphic should be exactly double the size of the low resolution graphic. In the case of
terrain, any pixel that's solid in the low-resolution graphic, should correspond to a 2x2 region of which at least one (preferably two or more) pixels are solid in the high-resolution graphic; likewise, any pixel that's not solid in the low-resolution graphic should correspond to a 2x2 region where no pixel is solid in the high-resolution graphic. This is not important for other graphics, though they should still line up with the position of the low-resolution ones.
Note that no NXMT / NXMO / NXMB file or scheme.nxmi is provided for the high-resolution graphics. They use the same metainfo as the low resolution ones (of course, where there are coordinates, these would be doubled in high-resolution).
