mixer brush performance

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  • Problem
  • Updated 2 months ago
when mixer brush is used with wetness on and "sample all layers" on, I get a worse performance with a smaller size brush than it does with a larger one.

this seems to be counter intuitive as a large brush should compute more data and so be slower.
imo indicates there's some underlying issue with the code. 

to reproduce, 
in a document with say 5k pixels wide

1:
create a noise layer to make sure "sample all layers" option has something to work on:
create layer, fill with 50% gray, then filter-> add noise. set to overlay

2:
below previous layer use mixer brush with settings
wetness 20%  load 100% mix 0% flow 100% sample all layers on 

select a color and try doing a stroke at different sizes, the smaller the brush size the longer it takes to finish.

its also excruciatingly slow at higher resolutions would be great to know if there's a way to speed it up while still using this same setup. 
thanks! 
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john smith

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Posted 2 months ago

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