Is it possible to create an operator that uses the luminosity of the image loaded when a brush is in 'image-based' mode?
I would love to be able to tie a brush's size, opacity, direction etc. to the image source used.
You could have four versions, one for luminosity an one for each RGB channel. If the source image is a different size than the canvas perhaps it could start at one corner or the center.
Thanks for the great software! Apologies if there's an existing way to do this or it's been suggested already.