they are no implemented way I think ( Fabrice ??) but you can achieve it this way : >create a compositeMaterial >create a ShadingColorMaterial (don't forget you need a light) as first layer >create a MovieMaterial as 2nd layer >as your MovieMaterial extend bitmapMaterial you should be able to play with >it's blendmode and set it to "product".
That should do the trick.
