Getting weird black lines on custom brush and Track Direction - Printable Version +- Gimp-Forum.net (https://www.gimp-forum.net) +-- Forum: GIMP (https://www.gimp-forum.net/Forum-GIMP) +--- Forum: General questions (https://www.gimp-forum.net/Forum-General-questions) +--- Thread: Getting weird black lines on custom brush and Track Direction (/Thread-Getting-weird-black-lines-on-custom-brush-and-Track-Direction)

Getting weird black lines on custom brush and Track Direction - simon2 - 04-20-2023 Hi, I'm trying to make a custom brush with a gradient and then use the paintbrush tool with the "Track Direction" dynamics to give the gradient to a line that I'm drawing. The brush works fine without dynamics, but when I apply the "Track Direction" dynamics, I get these weird artefacts. Per the image below: I attach my brush, in case it's something I've done wrong making the brush. RE: Getting weird black lines on custom brush and Track Direction - rich2005 - 04-20-2023 I do not think you have done anything wrong, look like it is associated with this post https://www.gimp-forum.net/Thread-Brush-problem--5967 and this bug https://gitlab.gnome.org/GNOME/gimp/-/issues/5509 What you can try is trim the brush into a circular shape so that edge rotation is negated. your trimmed brush attached. Use a small brush spacing, you still get boundary change edges but not the black pixels. Try working at a higher precision than 8bit - might help. [attachment=9712] RE: Getting weird black lines on custom brush and Track Direction - simon2 - 04-20-2023 Thanks very much rich2005! RE: Getting weird black lines on custom brush and Track Direction - simon2 - 04-20-2023 Still getting artefacts my end with your updated brush. Is there something else I'm doing wrong? RE: Getting weird black lines on custom brush and Track Direction - rich2005 - 04-20-2023 I honestly do not know. There is an issue with rotating a brush and generating those edge pixels. AFAIK not fixed. This an animation of the default settings using that round brush, which has a transparent border. https://i.imgur.com/AdszRVu.mp4 When you post a screenshot of a problem, always best to show the whole Gimp interface. Maybe someone will come up with better advice. RE: Getting weird black lines on custom brush and Track Direction - PixLab - 04-21-2023 You are doing nothing wrong, it's just unusable, if you can report it over there https://gitlab.gnome.org/GNOME/gimp/-/issues > maybe, they will try to fix it. 30-second video > https://imgur.com/q0lnQ8e The "only" thing I came across is to shrink the selection before Ctrl+C, but even though, it's far from perfect as you can see below [attachment=9714] I also noticed changing the original/default size will worsen the black dirt