If you want an actively maintained engine that also has high res graphics, take a look at Lix.
As the only currently active developer of NeoLemmix, high res graphics are something I can agree would be neat, but extremely, extremely low priority. Of course, NeoLemmix is open source, so you're welcome to submit code for this yourself - I'll integrate it if it can be done as a purely visual change with no impact on physics, sure. (Anything that introduces two different sets of physics is a big "no" from me and will remain so as long as I'm in charge of NeoLemmix; while just having a single set of physics but changing it from the current set would need significant community agreement, but I am open to it - though I think it's very unlikely that the needed community support would be there.)
I'd also ask whether it's really worth just supporting the WinLemm resolution, which is only double that of DOS and still very low by modern standards. The only advantage over a higher one is that graphics already exist for the official styles - but not the 50+ custom ones.
Hi namida, thanks for your reply and for engaging with this topic, it's really great to be talking about this with the NL developer!
I have tried Lix but find that it just... isn't Lemmings! The gameplay is the same, more or less, but I'm a very visually-oriented person (hence the obsession with Hi-Res graphics!) and the look & feel of Lix is not my cup of tea. I also think that wayyy higher resolution, such as in the Sony versions, is going a bit far - WinLemm is a nice balance between slightly prettier graphics and old school look/feel.
Thanks for offering to let me have a go at coding. I have to say though, my coding skills are extremely limited (I don't have any!), but I
am good enough with cartoon graphics to be able to help with getting a Hi-Res set together for NeoLemmix.
As a start, and to see if you're interested in this offer, I have attached red & green versions of the WinLemm animation sets for walker, faller, climber, floater, bomber and splatter. These would be for the 'highlighted' and 'skill assigned' Lemmings in NL (which is a super idea, btw - as are the forward & reverse step-frame buttons. Very nice!).
For some reason, I can't seem to find the animation sets for blocker, builder, basher, miner or digger anywhere in my WinLemm directory... if you can point me towards these, I'm happy to give these the same treatment.
Furthermore, if you like I am more than happy to create WinLemm-style graphics sets for all of the custom skills included in NeoLemmix. If you send me over the animation frames for each one, I'll scale them up to 24-bit and add the extra colours/pixels.
Of course, I'm assuming here that the WinLemm graphics follow the same physics as DOS/NL... if I'm wrong about this, please do let me know.
Best,
-WillLem