Sorry Henry I want to show hidden lines, correctly. RedSDK seems to be generating them (for the two longer sides) on this viewport like a perspective view, not an aerial view like the site view attached ? The walls on this view look straight, not on the first view ?
Intel i7-4720HQ 2.6GHz CPU, 32GB RAM, 500GB SSD, Intel HD4600 GPU + NVidia GeForce GTX 970M 3GB GPU
Win 10 64bit