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[Raptor5399]

Tried that last night but apparently needed to reopen the project after each delete.  The culprit is the projector shadow material in standard assets, which I am using in the project. Very odd...

Assets\Standard Assets\Projectors\Sources\Materials\Shadow Material

[Raptor5399]

Wow, it is even stranger than that.... the problem in Playmaker is because where I am using that shadow material, I have not given the material an image for the Falloff.  It has an image for the Cookie but not the falloff because I didn't want one.  If I set an image for the falloff and reopen the project, Playmaker is fine...

I can record a video showing this and send it to you if you want.

[Alex Chouls]

Very strange... it sounds like a Unity bug, like the shadow material leaves the editor in a bad draw state. But there might be a workaround if I can repro, so yes please, a video would be great

[Raptor5399]

I have reported the bug to Unity and emailed you a video.  For now, the workaround for me is to give the material a FallOff image and reopen the project.