Thanks. I came to the same conclusion that its something in cpml, or at least the way I was using it, although I didn't track it down to the invert call. I started implementing vector/matrix library based on Brinevector3D and matrix function implementation from cpml and as soon as I had the APIs tha...

I'm not sure if this is a problem with cpml, or something weird with the rendering context internally in love2d, but I'm seeing a strange issue causing rendered geometry to disappear when using a model view matrix where the camera has a forward vector that points predominantly in the +X or -X direct...