I have an issue with perspectives. I am trying to draw lines onto this 3D rectangle in the mage below to create a block paving type effect. If you've never seen block paving, it's square blocks of granite.
Here is the image:
I've tried placing the lines in manually, but when I get to the middle, it seems off. I want some sort of symmetry on either side so the lines look like their going into the distance.
How is this possible?