I recently upgraded to Mountain Lion on my work MacPro and have a clean install of AE CS6. When I create a new Text layer in the RayTraced 3D renderer it shows up fine. When I switch that text to 3D it disapears. Any ideas on why it is doing this? I've used the new Ray-Traced renderer quite a bit so I know it's not a set-up issue.
You can try viewing the Active Camera, front, left, whatever and the text is just gone.
Not sure what system info you need but here is some of it. We just ordered this Mac Pro about a 2 months ago. Everything worked fine before we upgraded to Mountain Lion.
Model Name: Mac Pro
Model Identifier: MacPro5,1
Processor Name: 6-Core Intel Xeon
Processor Speed: 2.4 GHz
Number of Processors: 2
Total Number of Cores: 12
L2 Cache (per Core): 256 KB
L3 Cache (per Processor): 12 MB
Memory: 12 GB
Chipset Model: NVIDIA Quadro 4000
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 2048 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x06dd
Revision ID: 0x00a3
ROM Revision: 3598