OSX retina - image paint brush paints 2x wider than brush setting, cant paint 1px #48456

New Issue

Martin Lindelöf · 2016-05-17T17:31:47+02:00

Martin Lindelöf commented

2016-05-17 17:31:47 +02:00

System Information
Operating system and graphics card
iMac (Retina 5K, 27-inch, Late 2015)
AMD Radeon R9 M380 2048 MB

Blender Version
Broken: Blender 2016-05-16 hash:29a17d5 (from buildbot)
Worked: (optional)

Short description of error
For a long time it's bothered me at work I have problems painting pixel art, at home on windows there's no problem to have a 1px size brush
and un-check pen pressure for Radius and draw. But at work on my Mac it's stuck at 3px, unless I check pen pressure for Radius as a work around.
I'm attaching some images with the settings and result. Please investigate I saw a similar bug about 8px resize upwards and nothing happening as solved.

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

Switch to UV/Image editor, make a new image, preferable really small 32x32 with UV Grid.
Resize brush to 1px, uncheck pen-pressure for Strength and Radius. Paint.

**System Information** Operating system and graphics card iMac (Retina 5K, 27-inch, Late 2015) AMD Radeon R9 M380 2048 MB **Blender Version** Broken: Blender 2016-05-16 hash:29a17d5 (from buildbot) Worked: (optional) **Short description of error** For a long time it's bothered me at work I have problems painting pixel art, at home on windows there's no problem to have a 1px size brush and un-check pen pressure for Radius and draw. But at work on my Mac it's stuck at 3px, unless I check pen pressure for Radius as a work around. I'm attaching some images with the settings and result. Please investigate I saw a similar bug about 8px resize upwards and nothing happening as solved. ![Screen Shot 2016-05-17 at 17.20.59.png](https://archive.blender.org/developer/F312808/Screen_Shot_2016-05-17_at_17.20.59.png) ![Screen Shot 2016-05-17 at 17.21.23.png](https://archive.blender.org/developer/F312810/Screen_Shot_2016-05-17_at_17.21.23.png) **Exact steps for others to reproduce the error** Based on a (as simple as possible) attached .blend file with minimum amount of steps 1) Switch to UV/Image editor, make a new image, preferable really small 32x32 with UV Grid. 2) Resize brush to 1px, uncheck pen-pressure for Strength and Radius. Paint.

Martin Lindelöf commented

2016-05-17 17:31:47 +02:00

Changed status to: 'Open'

Martin Lindelöf commented

2016-05-17 17:31:47 +02:00

Added subscriber: @MartinLindelof

Rob Waite commented

2016-05-19 18:46:49 +02:00

Added subscriber: @RJW

Rob Waite commented

2016-05-19 18:46:49 +02:00

On OSX 10.11.5, iMac (non-retina)
Official and 2016-05-18 Hash: 89df672

It works OK for me, with or without pressure sensitivity. Retina perhaps?

On OSX 10.11.5, iMac (non-retina) Official and 2016-05-18 Hash: 89df672 It works OK for me, with or without pressure sensitivity. Retina perhaps?

David Jeske commented

2016-05-31 07:14:11 +02:00

Added subscriber: @DavidJeske

David Jeske commented

2016-05-31 07:14:11 +02:00

I see the problem on OSX 10.11.5, retina MBP, official 2.77a abf6f08.

 https://www.youtube.com/watch?v=62yzADkMXZM&feature=youtu.be

I'll take a look tomorrow and see if I can figure it out.

I see the problem on OSX 10.11.5, retina MBP, official 2.77a abf6f08. ``` https://www.youtube.com/watch?v=62yzADkMXZM&feature=youtu.be ``` I'll take a look tomorrow and see if I can figure it out.

David Jeske commented

2016-05-31 23:06:08 +02:00

I have posted a patch D2044, which I believe fixes the problem.

The issue was that the paint brush was "adjusting" for retina pixel size by inflating the brush effective size by U.pixelsize (2 on retina machines, normally 1 on other machines). However, this meant a 1 pixel brush was 2 pixels wide. My patch removes this inflation and instead inflates the drawn size of the brush cursor by U.pixelsize to account for retina DPI.

https://developer.blender.org/D2044

I recommend changing the title of this bug to something like:

OSX retina - image paint brush paints 2x wider than brush setting, cant paint 1px

I have posted a patch [D2044](https://archive.blender.org/developer/D2044), which I believe fixes the problem. The issue was that the paint brush was "adjusting" for retina pixel size by inflating the brush effective size by U.pixelsize (2 on retina machines, normally 1 on other machines). However, this meant a 1 pixel brush was 2 pixels wide. My patch removes this inflation and instead inflates the drawn size of the brush cursor by U.pixelsize to account for retina DPI. https://developer.blender.org/D2044 I recommend changing the title of this bug to something like: OSX retina - image paint brush paints 2x wider than brush setting, cant paint 1px

Kévin Dietrich commented

2016-06-01 20:35:16 +02:00

Added subscriber: @kevindietrich

Kévin Dietrich commented

2016-06-01 20:35:16 +02:00

Can confirm the issue by switching to double pixel size ({nav User Preferences > System > Virtual Pixel Size}) here on Linux (kinda simulating what retina does).

Martin Lindelöf changed title from ~~Brush can't paint smaller than 3px unless pen pressure is checked for Radius in UV/Image Editor on Mac OSX~~ to OSX retina - image paint brush paints 2x wider than brush setting, cant paint 1px

2016-06-02 14:40:56 +02:00

blender-admin commented

2016-06-02 17:11:12 +02:00

This issue was referenced by c5b2f12b36

This issue was referenced by c5b2f12b36a048ffe7c78f42ffeed1e190ad8d1d

Campbell Barton commented

2016-06-02 17:11:55 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2016-06-02 17:11:55 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

OSX retina - image paint brush paints 2x wider than brush setting, cant paint 1px #48456