(2024-01-27, 22:08)Travis Cobbs Wrote: It looks like autocrop is working purely off of the RGB colors and not the RGBA (even though you have transparent background enabled). A temporary fix would be to set LDView's background color to 0xFFFEFF (-BackgroundColor3=0xFFFEFF on the command line, or the equivalent in ~/.ldviewrc) so that it is unlikely to exactly match any protruding detail in rendered parts. I will see about updating autocrop to pay attention to the alpha channel in the image if that is present. Note: the background color I proposed makes the green channel the minimum amount darker than the red and blue channels, so should look visually white. You could probably also use 0xFEFEFE.
I updated LDView's code to automatically use the alpha channel for cropping any time images are saved with transparent background enabled (which appears to be the case for ldraw.org's PT images). If you're willing to try pulling from git and rebuilding, it will hopefully fix the problem without needing the background color workaround. However, I'm not sure how easy it is to update and build the source tree you already have (although I know you made a minor change a while back).