mesh normals alternate every triangle or so

[hananbeer]

the output is almost correct. the vertecies are in place and triangles are well connected, except some of them have reverse normals which causes them to become transparent.

P.S. I am running on CPU where there is a known issue, luckily the solution at https://github.com/nywang16/Pixel2Mesh/issues/22 worked for me, so it's worth patching.

good work. :)