I've been searching around for a while now and I can't find anything at all on this topic, or at least nothing that helps me. I'm trying to implement point light shadows using (deferred) variance shadow mapping. I can blur a 2d texture just fine, but when I have a cubemap, I have no idea how to do it. I could of course just blur 6 2d textures but then there would be seams I assume. So does anyone know how to do this? (I would prefer a code sample rather than the mathematical solution, I'm not very good at understanding the math of these things). Oh and I'm using XNA4, if that matters.

So... no one knows how to do this?