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* Switching TerrainDetailMaterialManager to use ClipmapBounds for its detail mateiral id texture. This results in a lot of code removal and some simplifications for the shader. Signed-off-by: Ken Pruiksma <pruiksma@amazon.com> * Changing some names to be clearer Signed-off-by: Ken Pruiksma <pruiksma@amazon.com> * Reducing the update multiple back to 1 since this texture is updated purely on the CPU Signed-off-by: Ken Pruiksma <pruiksma@amazon.com> * Updates from PR review Signed-off-by: Ken Pruiksma <pruiksma@amazon.com>