Stylus pressure splike on first dab #85844

New Issue

炎臻 · 2021-02-21T14:44:25+01:00

炎臻 commented

2021-02-21 14:44:25 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: version: 2.92.0 Release Candidate, branch: master, commit date: 2021-02-19 18:02, hash: b1142858d4
Worked: 2.91.2

Short description of error
When using stylus(me wacom CTL-690),the first dab of a stroke has a too high pressure amount regardless of the actual pressure input.
The left stroke of each pair in the following pictures is drawn within Blender 2.92.0 and the right one is 2.91.2:
As what I have tested,sculpting,texture paint,weight paint and grease pencil all get influenced.

Exact steps for others to reproduce the error
{icon fa-plus} OS Conditon: WIN 10 |Blender: 2.92.0 Candidate|Tablet: Wacom CTL-690

Using stylus to draw a stroke in sculpt mode , texture paint mode , weight paint mode or grease pencil draw mode .Try having the pressure initially low,then the first dab drawn should get a high pressure amount which is false.
{icon rocket} In case,this is the blend file which is used to capture the pictures above:BugReport.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 **Blender Version** Broken: version: 2.92.0 Release Candidate, branch: master, commit date: 2021-02-19 18:02, hash: `b1142858d4` Worked: 2.91.2 **Short description of error** When using stylus(me wacom CTL-690),the first dab of a stroke has a too high pressure amount regardless of the actual pressure input. The left stroke of each pair in the following pictures is drawn within Blender 2.92.0 and the right one is 2.91.2: ![Pic1.png](https://archive.blender.org/developer/F9825360/Pic1.png) ![Pic2.png](https://archive.blender.org/developer/F9825375/Pic2.png) As what I have tested,sculpting,texture paint,weight paint and grease pencil all get influenced. **Exact steps for others to reproduce the error** {icon fa-plus} OS Conditon: **WIN 10** |Blender: **2.92.0 Candidate**|Tablet: **Wacom CTL-690** - Using stylus to draw a stroke in __sculpt mode__ , __texture paint mode__ , __weight paint mode__ or __grease pencil draw mode__ .Try having the pressure initially low,then the first dab drawn should get a high pressure amount which is false. {icon rocket} In case,this is the blend file which is used to capture the pictures above:[BugReport.blend](https://archive.blender.org/developer/F9825440/BugReport.blend)

炎臻 commented

2021-02-21 14:44:25 +01:00

Added subscriber: @PrettyFireNOI7

blender-admin commented

2021-02-21 14:44:25 +01:00

#85901 was marked as duplicate of this issue

blender-admin commented

2021-02-21 14:44:25 +01:00

#85902 was marked as duplicate of this issue

blender-admin commented

2021-02-21 14:44:25 +01:00

#85747 was marked as duplicate of this issue

blender-admin commented

2021-02-21 14:44:25 +01:00

#85851 was marked as duplicate of this issue

blender-admin commented

2021-02-21 14:44:25 +01:00

#85863 was marked as duplicate of this issue

Nicholas Rishel commented

2021-02-22 04:34:27 +01:00

Added subscriber: @PrototypeNM1

Nicholas Rishel commented

2021-02-22 04:34:27 +01:00

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

Nicholas Rishel commented

2021-02-22 04:34:27 +01:00

Note to anyone looking into this issue:

This issue is a result of Win32 mouse input not being synchronized with Wintab pressure. This has been an issue before 2.92, and has reappeared because the heuristics which discourage it from happening no longer work as well because Win32 mouse input was modified to support more accurate mouse movement (smooth lines when drawing).

There is no good long term fix, the issue is how Wintab works and the compromises to support current workflows in Blender.

The fix for this issue is to use Windows Ink (may require restarting Blender).

Note to anyone looking into this issue: This issue is a result of Win32 mouse input not being synchronized with Wintab pressure. This has been an issue before 2.92, and has reappeared because the heuristics which discourage it from happening no longer work as well because Win32 mouse input was modified to support more accurate mouse movement (smooth lines when drawing). There is no good long term fix, the issue is how Wintab works and the compromises to support current workflows in Blender. The fix for this issue is to use Windows Ink (may require restarting Blender).

炎臻 commented

2021-02-22 07:20:58 +01:00

This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning.
"Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver.

This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning. "Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver.

Nicholas Rishel commented

2021-02-22 08:31:36 +01:00

Added subscriber: @kursadk

Philipp Oeser commented

2021-02-22 11:37:51 +01:00

Added subscribers: @roman-13, @lichtwerk

Philipp Oeser commented

2021-02-22 11:44:17 +01:00

Added subscribers: @Harti, @Phigon

Philipp Oeser commented

2021-02-22 11:46:36 +01:00

Added subscribers: @dfelinto, @brecht

Philipp Oeser commented

2021-02-22 11:46:36 +01:00

@PrototypeNM1 : is this really Low priority?
(Looks like this is a regression?)

CC @brecht
CC @dfelinto

@PrototypeNM1 : is this really `Low` priority? (Looks like this is a regression?) CC @brecht CC @dfelinto

Brecht Van Lommel commented

2021-02-22 12:14:15 +01:00

@PrototypeNM1 please revert all high frequency mouse input changes as well then.

Correct tablet input is more important than high frequency mouse input.

@PrototypeNM1 please revert all high frequency mouse input changes as well then. Correct tablet input is more important than high frequency mouse input.

kursad k commented

2021-02-22 17:09:12 +01:00

In #85844#1116568, @PrettyFireNOI7 wrote:
This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning.
"Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver.

Blender offers an option to choose "Windows Ink" under "Input" settings, see if you are able to change it.

> In #85844#1116568, @PrettyFireNOI7 wrote: > This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning. > "Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver. Blender offers an option to choose "Windows Ink" under "Input" settings, see if you are able to change it.

kursad k commented

2021-02-22 17:13:55 +01:00

! In #85844#1116544, @PrototypeNM1 wrote:
Note to anyone looking into this issue:

This issue is a result of Win32 mouse input not being synchronized with Wintab pressure. This has been an issue before 2.92, and has reappeared because the heuristics which discourage it from happening no longer work as well because Win32 mouse input was modified to support more accurate mouse movement (smooth lines when drawing).

There is no good long term fix, the issue is how Wintab works and the compromises to support current workflows in Blender.

The fix for this issue is to use Windows Ink (may require restarting Blender).

I do not think that Windows Ink can handle multiple devices properly , as in using Blender with one device initially (Intuos pro) then turning on another device and keep using the open Blender in another device (Wacom Cintiq). My tests show that Blender cant utilize the pressure when I change to Wacom Cintiq while Windows Ink is the main driver.

Can Windows Ink in Blender handle transient usages between multiple pen devices like this in the same opened session?

>>! In #85844#1116544, @PrototypeNM1 wrote: > Note to anyone looking into this issue: > > This issue is a result of Win32 mouse input not being synchronized with Wintab pressure. This has been an issue before 2.92, and has reappeared because the heuristics which discourage it from happening no longer work as well because Win32 mouse input was modified to support more accurate mouse movement (smooth lines when drawing). > > There is no good long term fix, the issue is how Wintab works and the compromises to support current workflows in Blender. > > The fix for this issue is to use Windows Ink (may require restarting Blender). I do not think that Windows Ink can handle multiple devices properly , as in using Blender with one device initially (Intuos pro) then turning on another device and keep using the open Blender in another device (Wacom Cintiq). My tests show that Blender cant utilize the pressure when I change to Wacom Cintiq while Windows Ink is the main driver. Can Windows Ink in Blender handle transient usages between multiple pen devices like this in the same opened session?

Nicholas Rishel self-assigned this 2021-02-22 19:44:13 +01:00

炎臻 commented

2021-02-23 03:16:33 +01:00

In #85844#1117075, @kursadk wrote:

In #85844#1116568, @PrettyFireNOI7 wrote:
This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning.
"Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver.

Blender offers an option to choose "Windows Ink" under "Input" settings, see if you are able to change it.

Thank you for the information,had never known there is a setting.I got a solution currently from that and this solves the pressure first-spike and the drawing glitches(#85733) for my Wacom CTL-690. After changing Blender Tablet API from "Aotomatic" to "Windows Ink" in the preference (restarting Blender might be needed): If Blender the application is specified in the Wacom driver,make sure the "Use Windows Ink" check box is on in the Mapping tab,according to Wacom Guide this setting will let the tablet get the proper pressure input ( if the setting is not checked,stylus will have no pressure in Blender) : If Blender is not specified in the Wacom driver,check "Use Windows Ink" setting in the "All Other Applications" Mapping tab.
Issue happens while the Tablet API in Blender is set to Wintab.

> In #85844#1117075, @kursadk wrote: >> In #85844#1116568, @PrettyFireNOI7 wrote: >> This issue might needs other stylus or Wacom tablet users.I can't find a way to enable Windows Ink only while keeping my tablet functioning. >> "Use Windows Ink" setting in Wacom driver can't fix this problem and possibly my tablet is too old to work correctly without Wacom driver. > > Blender offers an option to choose "Windows Ink" under "Input" settings, see if you are able to change it. Thank you for the information,had never known there is a setting.I got a solution currently from that and this solves the pressure first-spike and the drawing glitches(#85733) for my Wacom CTL-690.![f1.png](https://archive.blender.org/developer/F9829059/f1.png) After changing Blender __Tablet API__ from "__Aotomatic__" to "__Windows Ink__" in the preference (restarting Blender might be needed):![f2.png](https://archive.blender.org/developer/F9829053/f2.png) If Blender the application is specified in the __Wacom driver__,make sure the "__Use Windows Ink__" check box is on in the __Mapping__ tab,according to [Wacom Guide ](https://www.wacom.com/en-au/support?guideTitle=Why-is-my-pen-drawing-or-a-keyboard-opening-automatically-in-Windows-10%3F&guideId=682) this setting will let the tablet get the proper pressure input ( if the setting is not checked,stylus will have no pressure in Blender) : ![f3.png](https://archive.blender.org/developer/F9829067/f3.png) If Blender is not specified in the __Wacom driver__,check "__Use Windows Ink__" setting in the "__All Other Applications__" __Mapping__ tab. Issue happens while the __Tablet API__ in Blender is set to __Wintab__.

Nicholas Rishel commented

2021-02-23 06:25:42 +01:00

All: this build reverts changes to that caused this issue. Please +1 if this fixes things for you or comment if there is still an issue.

All: [this build](https://blender.community/c/graphicall/lsbbbc/) reverts changes to that caused this issue. Please +1 if this fixes things for you or comment if there is still an issue.

炎臻 commented

2021-02-23 08:12:04 +01:00

In #85844#1117427, @PrototypeNM1 wrote:
All: this build reverts changes to that caused this issue. Please +1 if this fixes things for you or comment if there is still an issue.

Glitches(#85733) are gone for me (Tablet API changed to Wintab/Automatic).
The pressure error is still there when I use Wintab/Automatic Tablet API.

> In #85844#1117427, @PrototypeNM1 wrote: > All: [this build](https://blender.community/c/graphicall/lsbbbc/) reverts changes to that caused this issue. Please +1 if this fixes things for you or comment if there is still an issue. Glitches(#85733) are gone for me (Tablet API changed to Wintab/Automatic). The pressure error is still there when I use Wintab/Automatic Tablet API.

Nicholas Rishel commented

2021-02-23 17:43:11 +01:00

Added subscribers: @JeannotLandry, @filedescriptor

Nicholas Rishel commented

2021-02-23 17:44:23 +01:00

Added subscriber: @BlenderPretender

Nicholas Rishel commented

2021-02-23 18:14:53 +01:00

Updated build to test, ~~I don't think it will fix the issue but it would rule out a large section of code as the problem~~.

Edit: the above build should fix things.

[Updated build ](https://blender.community/c/graphicall/lsbbbc/) to test, ~~I don't think it will fix the issue but it would rule out a large section of code as the problem~~. Edit: the above build should fix things.

blender-admin commented

2021-02-23 18:50:03 +01:00

This issue was referenced by ee4f306509

This issue was referenced by ee4f306509679cf4aacb5367680f13044db60ea8

blender-admin commented

2021-02-23 18:50:03 +01:00

This issue was referenced by 37afeb7eaa

This issue was referenced by 37afeb7eaa8c2965fa4348b66b6ef600b7a3769a

Jerome commented

2021-02-23 19:49:50 +01:00

Falk David, I tried the test build provided on the referenced task (#85844) and the problem with the pressure sensitivity was resolved.

Nicholas Rishel, I downloaded the test build provided by your link on task (#85844) at: https://blender.community/c/graphicall/lsbbbc/.
Please be advised, my virus scanner found and deleted two files from that build. Attached is a screen capture of the files that were deleted. I do not know if those are standard Blender files or actually malicious as the scanner suggests. Just be advised.

Falk David, I tried the test build provided on the referenced task (#85844) and the problem with the pressure sensitivity was resolved. Nicholas Rishel, I downloaded the test build provided by your link on task (#85844) at: https://blender.community/c/graphicall/lsbbbc/. Please be advised, my virus scanner found and deleted two files from that build. Attached is a screen capture of the files that were deleted. I do not know if those are standard Blender files or actually malicious as the scanner suggests. Just be advised.![Capture.PNG](https://archive.blender.org/developer/F9832214/Capture.PNG)

Nicholas Rishel commented

2021-02-23 20:31:19 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Nicholas Rishel closed this issue

2021-02-23 20:31:19 +01:00

Thomas Dinges added this to the 2.92 milestone 2023-02-08 16:14:50 +01:00

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Stylus pressure splike on first dab #85844