Hi all, I'm trying to figure out a way to modify layer opacity using TexEnvCombine that takes into account the underlying alpha channel of a texture.
The osgFX::MultiTextureControl does very close to what I'm looking to do, but doesn't take into account the fact that the underlying texture may contain transparency (like a road overlay). >From my understanding of texenvcombine, I can either use a constant color or SRC_ALPHA as an operand, but not a combination of both. I really want a way to use SRC_ALPHA scaled by some user defined opacity value (0 to 1). Does anyone know of a way to accomplish this? I know how to accomplish this using a glsl shader, but can't quite figure out how to do it with texenvcombine. Thanks! Jason
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