Wireframe, Polymode, Gridshape

Hi all -

I had a small question - or maybe it is a big question.. I have a hard time gauging the scale of these things.

One can draw a cube with 12 lines. However, with a jit.gl.gridshape, and polymode turned to 1_1, a cube is drawn with a complex arrangement of triangles. This can be slightly modified with the gridmode and cullface options, but still, I can't seem to find the most basic representation of a regular drawn cube.

I noticed an older thread on the forum that drew them manually using jit.gl.sketch, but I'm wondering if that is the only way.

Thanks again for all the help.