Save Animation with transparency is broken. Here is how to replicate: * 5.12.0, Linux, builtin server * Load can.exo. * File/ Save Animation. Save as .avi. On the next screen, enable Transparent Background. OK. The .avi will be bonkers. Here is an example using can.exo. [badAnimationWithTransparentBackground.avi](/uploads/4d6ad2063cb5b23b20f153bc3d8a342c/badAnimationWithTransparentBackground.avi)