There are 2 possible fixes here:

1) After being turned by a Blocker, suppress the next 4px horizontal movement.

2) After being turned by a Blocker, reset the action/animation to frame 0.

Both of these fixes guarantee that the Miner will either not clip through terrain, or will destroy the terrain directly in front of them (after turning). However, neither looks quite right (the 2nd is definitely the better of the two in this regard), and both will likely break replays involving turning a Miner with a Blocker.

All other fixes (checking ahead for terrain, checking for during-movement terrain) interact poorly with existing physics, which often has the Miner stepping through existing terrain anyway.

NOTE: It seems worth mentioning that this bug is also present in SuperLemmini. So, it's not being caused by any changes to Miner physics made in RetroLemmini.

The only other option I can think of is to completely refactor the Miner's movement cycle so that it moves across-then-down rather than down-then-across. This could interact poorly with the sprite, though, and still wouldn't guarantee no clipping.

I'm still von my quest of finding a lemming plush toy. Something seemingly too impossible that I now try to make on myself. Did anybody try that? So far I got a small button recorder and now I try to find some hints or instructions of how to start. Some kind of map for plan how to cut various velour pieces to assemble and stitch together. Anybody ...? /Users/home/Desktop/Screen Shot 2026-08-17 at 9.40.42 AM.jpg

OK... so, the bug reported by Flopsy is actually not related to the 2px vertical movement, it's related to the 4px horizontal movement that the Miner takes at physics frames 6 and 30. This is responsible for clipping a Miner through terrain in the very specific case that:

(a) There is no more than 4px horizontal terrain in front of the Miner (in this instance, a Builder brick)

and

(b) The Miner has been turned by a Blocker at some point prior to (or at) frame 6 or 30, but not on a destruction frame (which would destroy the terrain anyway)

So, a particularly nasty bug with no immediately obvious fix.

@Guigui

Congrats on clearing the Mutilation rank of Lemmings Plus Alpha! This is a huge achievement, considering the very high difficulty of the pack. In general, each subsequent pack in the series is harder than the previous one, though this isn't always the case. In particular, the hardest packs are Lemmings Plus III, V, Lemmings Plus Omega II, and Lemmings Plus Alpha, with the last one arguably the hardest out of all the Lemmings Plus packs. While it is agreed by those who have played and finished LPO2 and LPA that they're no doubt very hard, depending on who you ask, it is debatable which of the two is harder. IMHO, I found LPO2 much harder than LPA, though in fairness I did backroute plenty of LPA levels

Mutilation 2 was the level that caused me to quit LPA for a few months back in the days. Yes, believe it or not, only two levels in and I gave up on the pack. Turns out that me not paying attention to the save requirement was what got me into so much trouble! I'm one of those Lemmings players who generally goes for save all's or saving as much as possible if 100% isn't possible. Because for some reason I thought you need to save everyone on Mutilation 2 (including cloners), you can imagine how well that went for me!

Lemmings Plus Alpha was also one of the very first custom NL level packs I played, along with Lemmings United. As a result, roadblocks came up very often for me due to how I wasn't as experienced back then! This is all in spite of how I played so many custom Dos packs back in the days, as well as how I managed to beat some of the toughest packs on Lemmini, including PimoLems and Lemmings Reunion. Thus, I thought I be fully prepared to take on the hardest NL level packs once I finally did make the dip into NL content! Nope, I was very wrong!

Anyway, if you ever feel like getting some help, I have a full playlist of LPA video solutions:

https://www.youtube.com/playlist?list=PLbp2m4KlFpJuV5DRnoM8Z7dWrfKsLnS7q 

In regards to intended solutions, if you're curious as to what they are, namida included replays along with the pack downloads in the OP

I think this might be a symptom of a bugfix (NLCEPlayer commit 8dbba16) intended to prevent Preview/Postview Screen key presses and mouse clicks from making their way into the game when auto-skip is active. You'll probably find that if you start up Playback Mode and un-check 'Auto-skip Preview & Postview Screens', this bug will disappear. Or, press F1 to restart, skip forward 1 frame, then you'll be able to unpause using the [Space] bar (or whatever key Pause is linked to).

This is clearly not ideal. I'll try out a different fix for the 'delayed input' bug, ensuring that frame 0 will allow key and mouse presses again (when in Playback Mode + Auto-skip).

Quote from: IchoTolot on July 24, 2026, 02:19:04 PMI think having the 'Replay-single-mode' as an optional setting could be the best thing here

Agreed: new players and those not fully accustomed to the Replay features need to be able to tailor their experience. We should provide options.

However, adding a 'Single Mode' option would inadvertently create three replay modes: 'Red R', 'Blue R', and the proposed 'Single Mode', all of which must be maintained.

I'd suggest that a simpler solution here would be to abandon the proposed 'Single Mode' as its own thing and instead offer players the option to have 'Red R' or 'Blue R' as their default (they'd still be mutually togglable in-game).

Then, we'd fine-tune the 'Blue R' mode to be more like the proposed 'Single Mode'.

Quote from: Simon on August 16, 2026, 04:58:00 PMI'm beginning to feel that airclick-to-cut is a fundamental design dead-end

In what way? And, why?

Quote from: Simon on August 16, 2026, 04:58:00 PMAlong the bottom of the screen, always show the replay as a timeline, like what a video player displays.
...
Tweaker always open, which is practically the timeline, but bigger and with all the bells and whistles.

Initial reaction: Hm. This would push NeoLemmix even further into 'Replay Editor' territory (as opposed to 'Video Game' territory) than it already is.

On second thoughts, though, these are good ideas. Perhaps the Replay Editor (currently a list-based Windows dialog) could be ditched in favour of this sort of thing. It shouldn't be displayed by default though, even in Replay mode; let the user call it up via a hotkey/panel button. We need to keep the UI as clear and clutter-free as possible.

In any case, this needs its own topic.

Quote from: Simon on August 16, 2026, 04:58:00 PMOver each lemming who will receive a replay assignment in the next 5 seconds, we paint a large arrow with the skill on it and a countdown. You can click an [X] on that arrow to cut the lemming's future.

Another good idea, let's put this into its own topic as well though.

This topic is about whether or not we should merge/revise the existing replay modes. UI-related stuff is important, of course, and we can certainly keep small tweaks within the scope of this topic, but more extensive overhauls belong in their own individual topic(s).

Quote from: namida on August 16, 2026, 10:20:20 PMThis might feel "good enough" that the periodic demands for reintroducing timed bombers finally die out for once and for all.

How so?

And, I doubt that this particular aspect of the game will ever be resolved. As long as we have users who experienced any one of the original Lemmings ports, timed bombers will be a thing that people remember and possibly miss (if they're absent from a particular clone engine). And, the community will always be split between those who like them and those who don't.

SuperLemmix, IMHO, does it best: the engine includes both types of Bomber as separate skills. Level designers can choose which to put in their level, and can even use both side by side, so that the player can decide which ones to use where (and, this can of course be built into the fabric of the level's puzzle).

But, that's also another topic!

Wow, nice art, you draw pretty well, congratulations!!!!!!!!!!!!!!     

Quote from: Simon on August 16, 2026, 04:58:00 PMIdea: Over each lemming who will receive a replay assignment in the next 5 seconds, we paint a large arrow with the skill on it and a countdown. You can click an

• on that arrow to cut the lemming's future.

Bonus: This might feel "good enough" that the periodic demands for reintroducing timed bombers finally die out for once and for all.

I'm quite a fan of it, but I can definitely admit it has some weaknesses.

The camera controls are the obvious one. They're not really much better on PC. The keyboard-based controls are an improvement over the mouse-based ones, but still not ideal. Lack of ability to tilt up/down is also frustrating.

The other one is that honestly, I don't feel the level design was the greatest, and especially, it rarely made full use of 3D. There are a few absolutely excellent levels in there that couldn't work in 2D (eg. Critical Path), but also so many that aren't all that interesting and/or the 3D aspect of them is limited to "assign a couple of turners" and/or "the path has turns in it, but there's no puzzle-related reason it couldn't be a straight 2D line". Think of levels like "This Is The Army" or "The Five Arches" here.

It was definitely very fun to make an original level pack for!

I always felt like 3D lemmings was a "mixed" game between the community for some reason. similar to lemmings puzzle adventure in a way. 

I'd say the game is decent, it does have some rough spots, like for example the controls, which can be a pain in the head, especially if your playing the PS1 version.   

Anc it does have some good in it, like for example the music, and some great levels that use the third dimension really well. 

So, whats your thoughts about it?