P: Shift-click behavior of brush is failing on size changes of brush tool
- November 22, 2025
- 6 replies
- 572 views
I often refine color-range masks with the brush tool, using it to add or subtract areas to the mask. To paint sharp angles/edges, I will 1) set the brush size to 0.1, 2) click in the smallest corner (A) of the area I want to adjust, 3) inrease the brush size to a much larger size like 10.0, 4) hold shift, 5) click along the edge (B) of the area I want to adjust so the tapered brush size creates the proper angle/edge, 6) continue holding shift, clicking to paint further along necessary edges (C)-(D).
This used to work. In release 15.0.1, things go awry at click (C). Once I make this third click, the original 0.1 brush-sized click changes size to match the larger selected brush size, so a large dot appears back at the beginning stroke. The rest of the taper remains in tact, but this new dot (which now needs to be further edited) is infuriating.
My best guess is this is a problem of LR offloading to the GPU (RTX 5070). If I count to 5 between clicks, it doesn't happen. Any faster and it starts going haywire.
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