Please use this part to report bugs & errors, ask questions & "How to..."
As far as I remember, this only works on very specific colors that have only 2 channels, and they are predefined in TVP , therefore you cannot precisely erase mixed colors (like brown in your example). In fact I already asked this question long time ago and I think there is no change in that regard since then: http://www.tvpaint.com/forum/viewtopic. ... rase+color
iMac, Os 10.12.6, Cintiq 22", TVP Std 11.0.8