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Fix: Smear brush on sculpt mode is causing vertex color alpha to keep increasing #115292

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Raul Fernandez Hernandez merged 1 commits from rifai.id/blender:sculpt-paint-on-transparent into main 2024-02-19 16:06:49 +01:00
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rifai.id commented 2023-11-23 10:23:39 +01:00
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The smear brush on sculpt mode is causing vertex color alpha to keep increasing (see before video). I think the amount of alpha should decrease the further away it gets.
My solution is to remove the blending of accum with interp_color and eliminate the usage of interp_color altogether. This will correct the behavior, as seen in the after video below.
I provided a blend file for you to test.

Before After
The smear brush on sculpt mode is causing vertex color alpha to keep increasing (see `before` video). I think the amount of alpha should decrease the further away it gets. My solution is to remove the blending of `accum` with `interp_color` and eliminate the usage of `interp_color` altogether. This will correct the behavior, as seen in the `after` video below. I provided a [blend file ](/attachments/470b7c27-5707-4d8a-83ea-28a7423f7092) for you to test. | Before | After | | -------- | -------- | |<video src="/attachments/8f28899e-13f2-455f-ac42-dd1464330f3a" title="demo_before.mp4" controls></video>|<video src="/attachments/041389b7-350e-44e2-84cb-a41f26905880" title="demo_after.mp4" controls></video>|
vcol_test.blend
2.7 MiB
demo_before.mp4
2.2 MiB
demo_after.mp4
3.3 MiB
Iliya Katushenock added this to the Sculpt, Paint & Texture project 2023-11-23 17:07:28 +01:00
Iliya Katushenock changed title from fix: Smear brush on sculpt mode is causing vertex color alpha to keep increasing. to Fix: Smear brush on sculpt mode is causing vertex color alpha to keep increasing 2023-11-23 17:07:36 +01:00
Iliya Katushenock commented 2023-11-23 17:08:21 +01:00
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Hi, just for note, video examples haven't be uploaded.

Hi, just for note, video examples haven't be uploaded.
rifai.id commented 2023-11-24 04:49:59 +01:00
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Oops, sorry. I just updated the links.

Oops, sorry. I just updated the links.
rifai.id force-pushed sculpt-paint-on-transparent from d0b8c4fb9f to 6d3c4a689d 2023-12-07 10:46:45 +01:00 Compare
Julien Kaspar requested review from Julien Kaspar 2024-02-19 12:16:45 +01:00
Julien Kaspar requested review from Raul Fernandez Hernandez 2024-02-19 12:16:49 +01:00
Julien Kaspar added the
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Julien Kaspar approved these changes 2024-02-19 12:19:08 +01:00
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I tested this out and it behaves much better on all falloff shapes.
Thanks for the PR!

I tested this out and it behaves much better on all falloff shapes. Thanks for the PR!
Raul Fernandez Hernandez approved these changes 2024-02-19 16:06:13 +01:00
Raul Fernandez Hernandez merged commit 71261f5212 into main 2024-02-19 16:06:49 +01:00
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