It shouldn't be needed as Camera .clone() is already copying .projectionMatrix.

Simpler check for colors in geometry. As suggested by @WestLangley in af042be6.

The false warning occurred when a vertex was on an edge of a triangle. The snip function should then return false, as there is a vertex inside the triangle, but this was not detected because of rounding errors. The use of EPSILON instead of 0.0 fixes this