I am hoping someone could help with a problem I am having with Mental Ray while rendering a huge scene which shows a landscape over 6 kilometers with trees and rocks and a road.
Each frame on its own looks great, but when I see the frames animated, my pixels all start to move around unpredictably. Parametric textures like the new autodesk Gravel and Grass as well as the regular Max Noise maps look really bad.

• I have created the scene using an incrementally created final gather map over 100 samples on the camera path.
• I have tested incrementally adding to a final gather map every 2 frames of animation with the camera path option deselected and I still have the same problems.
• Can I bake the textures? Would this help

I have an idea that I hope will work, as my resolution is quite small at 720x480 pixels. What if I render in full HD without antialiasing and then have Composite or AfterEffects shrink the image down to take advantage of software antialiasing.

I have tested this in VRay as well and I am getting the same problems. Sorry I don’t have access to my files until this evening to post sample images.

Thanks for your help.

Sounds like your final gather is setup correctly. Though final gather can cause light/shadow flickering when setup incorrectly, antialias flicker is tuned through the sampling quality panel under rendering/render setup/render. Take a look at this thread:

http://area.autodesk.com/for...antialiasing-vs-scanline/