SET AUTO REFRESH TO OFF OTHERWISE CUBEMAPGEN WILL START FILTERING THE CUBEMAP
AS SOON AS YOU TOUCH ANYTHING!

For environment cube (just converting from cross format to .dds,
unfortunately a pure no-op seems to be impossible in CubeMapGen,
but this is as close as I can get):
- Output size: 1024
- Output format: float16 RGBA
- Save Mipchain: no
- Filter Type: Disc
- Base Filter Angle: 0.0
- Edge fixup: no

For diffuse cube:
- Output size: 32
- Output format: float16 RGBA
- Save Mipchain: no
- Irradiance cubemap: yes
- Edge fixup: no
- Use solid angle weighting: yes

For specular cube:
- Output size: 256
- Output format: float16 RGBA
- Save Mipchain: yes
- Filter type: CosinePower
- MipmapChain: Mipmap
- Num Mipmap: 9
- Lighting model: BlinnBRDF
- Irradiance cubemap: no
- Exclude base: yes
- Gloss scale: 13
- Gloss bias: 0
- Edge fixup: no
- Use solid angle weighting: yes