Fading and disapearing brush stroke in viewport while painting in 'preview material' mode #78915

New Issue

Pascal · 2020-07-14T12:59:18+02:00

Pascal commented

2020-07-14 12:59:18 +02:00

test_painting.blend

HI,

System Information
Operating system: windows 10
Graphics card: nvidia 2080gtx

Blender Version
Broken: 2.90.0 (from the 07-12 release at least)
Worked: 2.83.2

Short description of error

'material preview' : painting stop to be displayed few time after the beginning of the stroke (with fading) and reappear at the end of the stroke when the LMB was released.
'solid' preview : painting works normally

Exact steps for others to reproduce the error
try to paint on the attached file in both preview mode and you will see the problem

Thanks.
Pascal

[test_painting.blend](https://archive.blender.org/developer/F8693416/test_painting.blend) HI, **System Information** Operating system: windows 10 Graphics card: nvidia 2080gtx **Blender Version** Broken: 2.90.0 (from the 07-12 release at least) Worked: 2.83.2 **Short description of error** 'material preview' : painting stop to be displayed few time after the beginning of the stroke (with fading) and reappear at the end of the stroke when the LMB was released. 'solid' preview : painting works normally **Exact steps for others to reproduce the error** try to paint on the attached file in both preview mode and you will see the problem Thanks. Pascal

Pascal commented

2020-07-14 12:59:18 +02:00

Added subscriber: @PMA33

Richard Antalik commented

2020-07-15 01:35:49 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-07-15 01:35:49 +02:00

I can't reproduce this. Are you using tablet, or does this happen using mouse as well?

Pascal commented

2020-07-15 09:10:30 +02:00

2020-07-15 08-53-17.mkv

2020-07-15 08-49-59.mkv

blender_2.83.mkv

it happens both with mouse and tablet, not in 2.83 but in the last 2.9 version (a mouse was used for these video)

[2020-07-15 08-53-17.mkv](https://archive.blender.org/developer/F8695545/2020-07-15_08-53-17.mkv) [2020-07-15 08-49-59.mkv](https://archive.blender.org/developer/F8695546/2020-07-15_08-49-59.mkv) [blender_2.83.mkv](https://archive.blender.org/developer/F8695563/blender_2.83.mkv) it happens both with mouse and tablet, not in 2.83 but in the last 2.9 version (a mouse was used for these video)

Pascal commented

2020-07-15 13:43:39 +02:00

I just find that the issue occurs when the stroke is slow, a quick stroke is ok but not really usable of course (no control and no smoothed curve but this is another problem I think ...)

2020-07-15 13-38-09.mkv

I just find that the issue occurs when the stroke is slow, a quick stroke is ok but not really usable of course (no control and no smoothed curve but this is another problem I think ...) [2020-07-15 13-38-09.mkv](https://archive.blender.org/developer/F8696864/2020-07-15_13-38-09.mkv)

Jacques Lucke commented

2020-07-15 17:19:30 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-07-15 17:19:30 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Jacques Lucke commented

2020-07-15 17:19:30 +02:00

I can reproduce it, there seems to be some kind of mouse movement threshold. Still have to investigate it a bit more.

Pascal commented

2020-07-25 08:45:56 +02:00

ok, after some tests (2.91 version) it appears that the issue occurs when one of the following tab is used (converted with the object interaction mode selection menu) for painting : layout, modeling, shading. With the native painting tab and other tabs (when painting mode is selectable) there is no problem apparently.