Grease Pencil Strokes drawn at 0.0 Strength still visible #94799
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Reference: blender/blender#94799
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System Information
Operating system: Win10
Graphics card: RTX3070
Blender Version
Broken: 3.0.0
Worked: N/A
Short Description
Setting the stroke Strength down to 0.0 still produces visible lines, easier to tell once you've drawn a couple of them over each other. True zero-Strength strokes are possible, but only by going into the Sculpt Mode, choosing the Strength tool, and holding CTRL while using the brush over the lines you've already drawn.
Steps to Reproduce
#94799.blend
To draw a stroke with 0 strength:
see: https://youtu.be/KRaTjUoh-8A
Added subscriber: @AFoxInSpace
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Needs User Info'
Thanks for the report. I am not able to draw any stroke with 0 strength
Do you use some tablet or you are able to reproduce with mouse clicks?
Are you able to reproduce this issue with factory preferences?: {nav Edit > Preferences > Save & Load (3 horizontal lines) > Load Factory preferences}
![image.png](https://archive.blender.org/developer/F12717357/image.png)
(run
C.scene.tool_settings.gpencil_sculpt_paint.brush.strength
in console to check if strength is actually 0)It's hard to see with just one stroke drawn at 0 strength, but it's there. Draw a couple over top of each other and you will start seeing them.
Here's a video. Factory settings, drawing with my mouse instead of the tablet, the result is the same.
https://youtu.be/KRaTjUoh-8A
Changed status from 'Needs User Info' to: 'Confirmed'
Added subscriber: @antoniov
Thanks for clarifying @AFoxInSpace . Now I can confirm.
@antoniov , can you look at this? Behavior looks same on older versions as well. Is that a floating point precision error or something like that?
I try to reproduce and I cannot... I draw again and again over the same place and never get the "shadow" stroke.
Added subscriber: @frogstomp-4
I can also confirm. Tested in 3.0 and 3.1 from blank file. Takes about 100 strokes to see it and good contrast monitor. It goes away with sculpt -> strength
@frogstomp-4 Tablet or mouse?
This issue was referenced by
fcdaeba778
This issue was referenced by
ccb2456df6
This issue was referenced by
44ac03785c
This issue was referenced by
ac3d07ad17
Changed status from 'Confirmed' to: 'Resolved'
Hi @antoniov , also mention this bugfix for backporting
Fix seems safe to backport but double check with Philipp.