Geometry normals are flipped

[funwithtriangles]

Currently, to have materials display correctly, you need to set side as BackSide or DoubleSide. I don't think this is particularly intuitive. I reversed the array in geometry.js and it works fine now. Not sure if this is something you want fixed but I thought it was worth mentioning! Haven't tested with UVs yet.

[spite]

That would be great. I know i did a bit of fudging with the numbers to get something on screen, and usually DoubleSide is a smell when doing geometries.