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* Adding clearcoat to linear transform cosine lights (quad and polygon lights). Also fixed several warnings in various places in our shaders. Signed-off-by: Ken Pruiksma <pruiksma@amazon.com> * Fixes from PR review Signed-off-by: Ken Pruiksma <pruiksma@amazon.com> * Updates from review feedback - pulled out some of the duplicate code into functions. This required some minor restucturing. Ran ASV Area light tests to make sure nothing changed and validated clearcoat was working in a separate project. Signed-off-by: Ken Pruiksma <pruiksma@amazon.com>