Sirius

D2X-XL is not currently under active development - at least, not the official version. Arne has a fork on GitHub where he made some stability fixes - it might be worth checking if that works for you. https://github.com/arbruijn/d2x-xl

There were forums on descent2.de but they fell into disuse and may not currently be working. For general Descent 1/2 development, I would suggest the following server on Discord: https://discord.gg/kjb5FkzMzf There hasn't really been much done with D2X-XL for a long time, although Arne has created a fork that has a handful of tweaks to improve stability at the cost of some performance. There are a few people there working on various projects to improve Descent though; I'm not aware of a Unity/Unreal...

1.12.31 - Custom textures imported with DTX 1 are corrupted upon opening a level

This should be resolved in version 1.12.32.

Hmm... I think the two things are related. DLE doesn't account for the fact that the DTX patch might include sounds, too, not just bitmaps, and that results in reading the bitmaps from the wrong offsets. And because it doesn't read sounds, it doesn't save them either. It looks like there isn't an easy way to solve that for now, which would make the quickest fix... don't save edits to DTX files, I guess.

Completed the manual version of this function for next version. In a separate conversation Xfing confirmed that was an acceptable solution.

Feature request: cube count optimization

Cube optimization requires an algorithm I don't currently have, except for trivial cases which occur rarely outside of bad levels. It might be possible but I'm not sure it's not NP-hard, and need to do research so it's not a near-term goal. I can implement a manual "merge the selected and other cube into one" function though. It would only work if they were currently joined, and would have to detach the cubes from surrounding other cubes to avoid corrupting their geometry, but would at least let...