Texturing Format Information (Modders Please Read!)

[rbray89]

Jup. And automatic resizing seems to only occur if necessary. The directx texture behind a texture resource created by unity could have 64x20 when created with that resolution on my system. NPOT is still not recommended, ofc!

Some other details that surprised me/ i found interesting (though are directx specific):

- There is no real RGB24. A texture created with this format usually becomes D3DFMT_X8R8G8B8 with still 4 byte per pixel. Thus using RGB24 to save GPU memory doesn't make sense. Its still nice to tell unity to compress to DXT1, ofc.

- All textures i encountered so far were D3DPOOL_MANAGED. That means all of them are backed by system ram. Making them non-readable only gets rid of Unity's own backing (for editing, i suppose). Though i don't understand why textures cannot become readable again, especially when reading/writing all pixels anyway (and at least from a DirectX point of view). This also explains how unity can survive "simpler" device resets.

Hmmm... as for the making non-readable, it is likely there for platform compatability.