BackBufferToTex with mask?

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salric

Does anyone know of a way to create a masked texture (with flag=4), render to the texture with BackBufferToTex and have the mask preserved so that the texture is transparent for the color black when applied to an object?

I tried to modify the render to texture demo provided with MiniB3D, simply adding the flag 4 to the createtexture command does not work.

Any ideas?