I appreciate the direction from everyone, but I still haven't been able to troubleshoot the problem. I am running HD Suite 2017, and I have verified my system settings are sufficient. Here is an example of what I am seeing. Most of the materials I use show up as black unless I zoom in very close. Paint colors on walls show up fine, but if I put tile on a wall, it shows up black. When I place a door, the default color will show, but if I choose a different material, it shows black. This same thing happens when I am using 3D cameras inside the plan. It doesn't make sense that some materials appear fine and others black. Any ideas?