[SHELVED] Material Layering Feedback for 4.19

anyone got an issue where the material blend wont really change after the first compile? playing around with having both a pre-made mask and blending it with vertex color and it sometimes works and sometimes not, it seems completely random.
no blend:
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New Blend with just mask:
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same blend with a lerp (notice no change in the shaderball or model)
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same blend but the lerp disconnected so it should be full green or brown but its the same
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