(2020-06-02, 17:41)Travis Cobbs Wrote: The preview uses LDView, and doing some digging, I see that there is a bug in LDView's snapshot functionality when textures with partial transparency are used in conjunction with the "Transparent Background" option of the snapshot saving. There also appears to be a problem with textures interfering with conditional edge lines, as well as probably another problem with textures placed over studs causing issues. I will try to track down the problems and fix them, then update the build used by the part tracker, but it could take some time.
Yes, if you're referring to the three bugreports raised yesterday, that was me :-)