https://bugs.kde.org/show_bug.cgi?id=361923
Bug ID: 361923
Summary: Inconsistencies of rendering (brush stroke) depending
viewport zoom
Product: krita
Version: 3.0 Alpha
Platform: Compiled Sources
OS: Linux
Status: UNCONFIRMED
Severity: major
Priority: NOR
Component: Brush engine
Assignee: [email protected]
Reporter: [email protected]
https://share.kde.org/index.php/s/t83Vga0cIgr7gfg/download
[^ video of the issue, 50 second, *.webm , 5MB. Quick description: first 25
second (left) 50% viewport all is fine, last 25 second (right) 44% viewport and
bug ]
Hi, I open here a bug report about inconsistencies of rendering (brush stroke)
depending viewport zoom: in 3.0(alpha) my brush strokes are all rendered
correctly at discrete zoom of viewport, but not when I use a random viewport
zoom value.
How to reproduce
===============
* Use a brush preset as 'Deevad E4 Splat' (
http://www.peppercarrot.com/extras/resources/deevad.bundle )
* Be sure viewport zoom is at 50% ( you can use numkeypad+ and numkeypad- to
navigate from discrete zoom to discrete zoom )
* paint strokes : they render perfectly on release of stylus or mouse-button.
* Now, zoom to a value 'not discrete', ( in video 44% ) with Ctrl+Space+drag
* Paint stroke with the same preset
Result:
======
After the release of stylus or mouse-button, the stroke is changing *totally*.
It produce a non WYSIWYG experience of painting. (a bit like typing a letter on
keyboard, and having another letter on screen). This is even more dramatic
after painting a long stroke to add texture to a scene, and then release the
stylus and get a totally different rendering.
Another effect is also something like 'self-collision' of stroke and tile
flicker if you paint over another stroke. It's visible on the video. I describe
it like a semi-effect of the brush blending mode 'copy'.
References/Spec:
==============
- Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz
- GeForce GTX 650 Ti , Nvidia proprietary driver 340update, OpenGL canvas 'on'
- Ubuntu 16.04, Cinnamon desktop 2.8.
- Video recorded in mid of week ( git6b2491e ) , reproduced with a daily build
of 1 min ago ( git fb07755 )
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