>>3585893>Not OP but could you explain this? How would I do that in lightroom?You can't in LR, as far as I know. LR doesn't work with channels. Use PS. Check the single RGB channels, see what kind of information they contain. Select the channel you want to replace, the image goes BW, then use Apply Image under Image menu. That's one of the most powerful tools in PS. Select the current layer and the channel you want to replace with, keep the blending to normal and click ok. The layer has weird colors now, just set its blending to luminosity and there you go.
