Hi!

When I create filter brush with the burn filter set at shadows it creates green stripes on the canvas. It happens when I use the burn-filter in the filters menu with the shadow setting too.

Most kindly,

Andreas Raninger

I tested to change to software instead of opengl, change 16 to 8 bits depth and changed color profile with the same result. When I save the image to jpg and reopen the image the burn filter works as expected without any green diagonal lines. Krita version 3.3.2 Windows but I have experienced this in earlier versions and on different hardware and in Linux Fedora 26/27.

I can't reproduce that here. It might be best to report a bug at bugs.kde.org, with a file that shows the behaviour and maybe some images with the behaviour.

I'll do some more testing so that I'm shure it's a bug and not just me doing goofy stuff in Krita. I'm going to try the OS X version too.
What I usually do that makes this happen:
1. Create a new document with A4 300dpi 16bit depth.
2. Change the background layer to middle grey
3. Open a new image from my texture library in the form of an jpg-image.
4. Copy it into my krita document with ctrl+a, ctrl+c, ctrl+v.
5. Create a new filter brush and set it to the burn filter and with the shadows setting.
6. Painting to make shadows darker and where I paint I get diagonal green transparent lines.
Middle and highlights works with no problem.

*Edit*
No green stuff in OS X High Sierra, Krita 3.3.2.

I've done some more tests and Color depth 16bit is the problem. 16bit float works and 8bit.

Yeah, can confirm that here. Can you report a bug at bugs.kde.org? That effectively serves as our todo list, and otherwise we'll forget this bug.

Done.
It looks like the filter is trying to do 8 bit operations on 16 bit. But then, what do I know.