This is a different issue I've come across while working on my shadow problem.
I decided to make a new tiki file for my oak tree so I can give the leaves an autumn texture. Everything works fine in radient, but in the game my sprite texture for the tree does not work. I've even tried pointing the shader to the original mohaa texture but it doesn't work either.
The other 6 shaders are working properly so I didn't post them. And this seventh shader works in Radient, but not ingame.
That texture IS in my folder. That one is actually the original .tga image. I was trying it out since my modified texture was not working. But this one doesn't work either. I also tried changing that sprite shader to access the original Mohaa textures in the textures/models/natural/ directory, just like the original shader. But for some reason, that broke the original tree as well.
I don't know if that is a spearhead only thing. I have all the Mohaa textures and shaders extracted into a library for easy access. Maybe I replaced an AA version with a Spearhead version of the trees shader.