With the release if the Maintenance Viewer (4.0.2.312269) in week #11, invisiprims pretty much died their final death. Support ended for these critters in 2011. The code that renders them invisible has been in viewers up to this release. But, with this release something changed.

Inviziprims were prims with a special texture that caused things behind the texture to become transparent. Rendering-wise this was nightmare and problematic. The Lindens took advantage of a happenstance of the render pipeline to get them to work. I understand Crazy Mole once built a dry dock using invisiprims (the picture). Many boat builders used them to make the water inside their boats disappear.


