Of course. Here you go:
First test:This is what it _should_ look like:
This is what it _does_ look like:
Second test:3072x512 pixels, TGA with RLE-compression, no alpha: Not showing up
1536x256 pixels, TGA with RLE-compression, no alpha: Not showing up
768x128 pixels, TGA with RLE-compression, no alpha: Not showing up
384x64 pixels, TGA with RLE-compression, no alpha: Not showing up
But all of them are rendered properly when doing the level-load workaround I posted before (loading another level, then reloading the original one)!
Notice: Neither in the materials, nor in the effects-sections of my scripts did I change anything since the time when I was still using 6.31.4. Unfortunately, I couldn't test it with 6.31.4 as I have only one computer up and running and don't feel like reinstalling 3dgs completely. If it is really, really necessary, I will do, but since you can see what the shader effect is supposed to look like with the workaround (did the screenshot that way), I'll stick with 6.4 for the moment.