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Can you elaborate a bit? i'm not certain what you mean.

I'm working with a 14-layer image atm. my end result is to export layers as files and reassemble them elsewhere. and i'm planning to do this a lot more, so idelly anything that minimised interaction with each layer would be best.

I think what would be idea for me would be some filter to do what saving as PNG-8 does, splitting the image into binary alpha. if i could do that from within photoshop, then i could just select and delete any unnecessary solid parts and be happy.