The Filter "Lighting Effects" crashes when I use a channel as Bumpmap
Operating System: Windows 10
Package: GIMP 2.10.20-1 Installer from gimp.org
Description of the bug
I'm not really sure that it's a bug, but the filter "Light Effects" always crashes when I do the aforementioned things. I tried to follow an old german Tutorial on Youtube (https://www.youtube.com/watch?v=Z8hXf1O7F0g) to create a beveled text by using a channel as Bumpmap for the "Lighting Effects"-Filter. I followed the instructions step by step, but when I set the channel as Bumpmap or sometimes a little later when I set the adjustments for the filter, the filter crashes.
Is the bug reproducible? Always, but not always at the same time
- Create a new image (640x480 pixel).
- create a gradient on the Background Layer.
- create a centered text, 50% grey, Georgie (fonts), size 120 pixel.
- set the text layer to image size.
- make "Alpha to Selection" on the layer with the text
- create a new channel with the checkbox "initialize from Selection" marked.
- turn off the selection
- Blur the channel four times with the Gaußian Blur Filter. The first time 8 pixels, the second time 5 pixels, the third time 2 pixels and the last time 1 pixel. Don't know if it really makes sense to blur it four times, but the tutorial said so.
- turn the channel invisible
- rightclick on the layer with the text and click "Layer to Imagesize".
- open the filter "Lighting Effects" (Light and Shadows)
- define the new channel as Bumpmap Image.
- If the filter hasn't crashed at this point, define the "Maximum Height" to 0,04.
- If the filter still hasn't crashed, go to "Material" and set the "Glowing" to 0,6, "Bright" to 0,5 and "Shiny" to 1,0.
Not later as at this steps the filter will have crashed. …
Expected result: a beveled text
Actual result: no beveling at all.
GIMP Error Plug-in crashed: "lighting.exe" (C:\Program Files\GIMP 2\lib\gimp\2.0\plug-ins\lighting\lighting.exe)
The dying plug-in may have messed up GIMP's internal state. You may want to save your images and restart GIMP to be on the safe side.