Color replacement brush not working

[lysynski]

The brush doesn't replace the selected colour, it replace everything else - see attached video.  Start brush in hair, colour replacement is barely visible (also a problem), moving brush into other areas (face) continues to replace colour.

[NathanC]

Hi @lysynski,

Moving the brush into areas containing different colour values is likely to continue painting if the 'Sample Continuously' option is enabled, this is also affected by the tolerance setting. The colour replacement is less visible on the hair as the tool tries to retain the saturation and lightness values of the original pixels.

• Tolerance—sets the range of pixels affected when a pixel is clicked. For lower tolerance settings, pixels must be very close in value to the clicked pixel. For higher tolerance settings, pixel colour can vary widely from the clicked pixel.
• Sample continuously—if this option is off (default), the initial click position determines the reference colour to be replaced. When selected, new reference colours are determined as the cursor moves.

https://affinity.help/photo/English.lproj/pages/Tools/tools_clrReplacementBrush.html

[lysynski]

Hi @NathanC

Ok, I get the "sample continuously" but it doesn't explain why the replacement is muted, washed-out, pale... what ever you want to call it in the hair, there's obvious highlights (not many) that should become green.  You can see the same in the other parts of the photo; the 50% grey background should become 50% green, it's barely 10%

[walt.farrell]

27 minutes ago, lysynski said:

but it doesn't explain why the replacement is muted, washed-out, pale

Have you considered that the tool is misnamed, and should be called "Hue Replacement"?

It does not replace the color, only the Hue, keeping Saturation & Lightness the same.

That explains many situations where people think the replacement isn't working properly.

[lysynski]

@walt.farrell you may be right and if we consider it right then it's obviously an error/bug since as you point out... in many situations people think the replacement isn't working properly. It needs to be corrected and be a colour replacement brush or renamed to hue replacement... I'm not sure how many will be happy with that.  Look at Photoshop, Paintshop etc... color replacement brush - it works exactly as expected!

[Old Bruce]

16 hours ago, lysynski said:

It needs to be corrected and be a colour replacement brush or renamed to hue replacement

Easiest solution is the renaming. Then the hard work can take place on making a Colour Replacement Brush.