crunch VS TabGraph

As an aside, crunch compression is a bit of a red herring here. While it does reduce the size on disk, it needs to be expanded back to regular DXT when it's first displayed, so it won't solve our memory issues by itself.

Have you considered compressed texture formats? Fixed compression ratio (usually 1 byte per pixel), arbitrary random access, decompress the pixels you need on the fly. Can be further compressed for efficient storage closer to JPEG ratios with https://github.com/BinomialLLC/crunch.

After spending some time trying several libraries, I settled with FasTC for now, but it seems to only be able to manage 32 bits RGBA image formats... I am looking into Crunch2 which is basically Crunch with modern CMake.

Here you can find my toy engine, the CMakeLists may be a bit of a mess though, I am kind of a beginner when it comes to using CMake, but the idea is to let CMake generate the Visual Studio files and folders architectures on its own, it's a very powerful tool, very useful if you ever want to go cross-platform.

What do you mean by "triangles only" ? Triangulating arbitrarily sized polygons in wavefront formats is pretty simple, here is how I do it (I have to redo this code as it's a mess but you get the idea)

If you are interrested, you can find my code here, be warned though : it's a mess 😅

Here is how to compute rotation from Yaw Pitch Roll once you got that you can simply use mouse X, Y as Yaw, Pitch