Hello,
Just to follow up on my original post, I think I may have finally identified what is going on here and it may relate to PhotoScan directly. The artifacts in my model appear to be due to using OpenCL on a newer MacBook Pro. I have a MacBook Pro i7 with 8GB of RAM and the ATI Radeon HD 6750M graphics card. When I enable PhotoScan to use the OpenCL device, I get the artifacts throughout my model. When I disable this device I get clean models with no artifacts at all. No other changes in parameters, just disabling the OpenCL device. I have now tested this on a couple data sets with and without OpenCL and it seems to be consistent. Same problem exists in PhotoScan Pro 0.8.3 and 0.8.4.
Thanks,
Scott