When looking at metal grills through glass, and logic lights are flashing around the grill, the grill will disappear and reappear intermittently. (used red logic flashing lights)
Cleared up report:
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This is most likely the see through glass side effect, however I have seen metal grills with errors beside doors, so there may be a different influence, will test that in more details.
Possibly related to the same issue leaf blocks have when looking at them through glass
As you can see one side you can see the grill blocks just fine the others not so much....
This seems to happen with as the title says and also as Zachey said. But I cannot seem to find any other way this happens. Possibly a rendering bug.
