(2018-05-17, 8:10)Philippe Hurbain Wrote: This is not really a bug, but a side effect of back face culling ("backwards" faces are not supposed to be seen - which is obviously wrong for transparent patterned parts). Printed parts that exist in a transparent version now contain a "BFC NOCLIP" statement that prevent this (see for example 3960ps4 or 21849ps1), but of course this is not done on parts not supposed to be transparent.
There is also an option in (1.6b) to disable bfc for transparent parts. But this still wont always fix the problem due to the drawing order.
For 2.0 I'm hoping my planned "order independent transparency" shader adventures will fix that in a HQ setting or something.