Do you put large water areas?

Another solution, then, is to draw only the outline of the trigger rectangle in the contrastful color. The inner area can be fully/mostly transparent.

-- Simon

Gonna be real here, the pink color for the trigger area is starting to get a bit too bright. It's my least favorite to keep turned on while making levels simply for its intensity. Its the most apt issue in editor. and I did notice it on Icho's videos for the contest (the one contest level with the new objects)

I get the color needs to contrast from the level, but it might be prone to eye strain.

Link to jkapp76's working L3 portable:

https://u.pcloud.link/publink/show?code=XZng3j5Zmjvy5pvxrKyxrWgE2q0VlpDg89dX

Simply double-click the "Play Lem3.bat" file and it should work. If you don't wish to play it fullscreen, you can edit the 486.conf file and change the fullscreen = true line to fullscreen = false and set the resolution you wish for windowresolution. Many thanks to jkapp76 for taking the time and commitment to getting the flicker issue in the L3 intro movie fixed, as well as to Simon and The Tomato Watcher for their help!

I've also posted the link in the OP as well  

I can confirm that jkapp's portable L3 copy in reply #7 in the post right above this one that everything works perfectly, including the intro movie with no flickering and the screen moves! Many thanks for taking the time and commitment to getting the issue solved. I appreciate it a lot and all the help from you, Simon, and The Tomato Watcher

I've tagged the topic title as "solved." I'll go ahead and post the link to jkapp76's portable in the "how to play L3 in Dosbox" topic  

All right, Sunday (in two days) at 14:00 UTC. See you!

-- Simon

It would almost be better to incorporate the splat ruler into the cursor somehow, in the same way that arrows can be displayed for direction select. The only issue there is that the cursor is resizable.

Sure, we can look at the source together. If we can find anything obvious, let's fix it. I'll add the suggested meet up time to my calendar, see you then

https://u.pcloud.link/publink/show?code=XZng3j5Zmjvy5pvxrKyxrWgE2q0VlpDg89dX

Here's another updated version of my Portable Lemmings 3 game.

This is much larger, 450MB. But it's a more recent version, 1.53 instead of 1.48 and this one mounts and plays CD audio and still saves properly to the hard drive. I also included the Gravis Ultrasound drivers installed in case you want to change the audio to GUS in the settings. I found this version of the game after talking with the youtube uploader that showed the game playing properly.

I think you can simulate a multi-monitor setup in virtual machines if you don't personally use a multi-monitor setup already and it would cost more time/money then is worth to get one to test this bug e.g. if you don't just have a spare TV you can plug in to your computer or something.

These monitor bugs -- wonder why nobody has run into them before, and you found 3 or 4 of them already this year. And you're not even using Windows 11, which is nowadays's easy blame target.

This one is particularly astounding. The already-loaded sprites, exits, hatches, ... all remain intact. Only the terrain layer becomes black or transparent, even though it's a VRAM bitmap like any other sprite/exit/hatch. Or is it? I should research. But then new terrain (the later-built staircases) can be painted onto the black/transparent as if nothing were out of the ordinary.

The terrain VRAM bitmap may be large (it's a single piece, 1:1 the size of the level), but the spritesheet is also large at 913 x 946, about the same order of magnitude as that map. That would rule out size.

No idea, must reproduce from first principles. And first find a multi-monitor setup.

-- Simon

The answer I was hoping for was: You look into the source and see an obvious performance bug with the splat ruler within 5 minutes.

According to your testing, I doubt that the lion's share is due to Wine; it's a general issue. But I haven't investigated other than how a freshly started CE won't freeze in Wine either. Even on Turrican's Space Program 10,000 BC, yes, it still stuttered, but it wasn't frozen for seconds. All my testing in this entire thread has been with low resolution and low-quality minimap.

Before you put a warning, I'd wait until we all have researched this better. The warning would also break NL compatibility in a weak sense: NL won't scold you for making large levels, but CE would.

Do you have time on Sunday, June 15th, 14:00 UTC, to dig into the CE source together in Mumble?

-- Simon