I have no problems making the source pixels. It's saving them in a format I can use. The photoshop DDS plugin is windows only I can make dds square files, but it seems Maya's LT reflection cube map node in shaderFX wants a cubemap DDS in a very specific format, and I need to find a way to author that using OSX tools if at…
For anyone curious, I managed to find the solution. You need the plugin from Welbot's link. Be sure to check the readme for installation instructions. This is the layout you need, 4/3 where it's 4 units tall and 3 wide. Your width has to be a power of two. Save as DXT5 with none for alpha channel and tick "cube map" at the…