I tried the cube method with a cloudy sky and got good results (see picture).
To answer your question Ben- you don't need to cut the cube texture up- it stays one piece. Just use the PRF Editor's TRX converter if you want it bigger than 256.
Attached is a sample cube-sky in MQO and MDO formats. The sample's cube texture is from cgtextures.com and it's not aligned or sized optimally for SoM. It's just for a sample.
In case anyone wonders, the 'dummy' texture/mesh in the sample is to take up SoM's drifting sky 'slot' so that the cube-sky texture won't drift like the fog does in SoM.
To answer your question Ben- you don't need to cut the cube texture up- it stays one piece. Just use the PRF Editor's TRX converter if you want it bigger than 256.
Attached is a sample cube-sky in MQO and MDO formats. The sample's cube texture is from cgtextures.com and it's not aligned or sized optimally for SoM. It's just for a sample.
In case anyone wonders, the 'dummy' texture/mesh in the sample is to take up SoM's drifting sky 'slot' so that the cube-sky texture won't drift like the fog does in SoM.