Can I do alpha for color channel only while height/ normal channel would stay unmasked ?

[kirkr5689]

is it possible ?  for example to color only cavities of a layer  ?

[Cyril Dellenbach]

Hi @kirkr5689,

I'm not sure to fully understand your need, but you can't mask a specific channel of a layer without masking the other channels.

To color only the cavities of a Layer, I would either use a compare mask, or Anchor point with Levels.

Regards,

[kirkr5689]

Thanks Cyril ,  Could you please tell me how can i mask a specific channel only?   You mean by doing a layer copy with  say  color channel   only   and unchecking   it on original layer?