I'm currently working on the same thing.
I think the way to do this is regenerate cubemap each time when light changes it's position. So only very small cube maps can be used.
If u will find way to rotate cubemap, write solution here please.
I think the way to do this is regenerate cubemap each time when light changes it's position. So only very small cube maps can be used.
If u will find way to rotate cubemap, write solution here please.