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. This scene was created in Max but I am hoping the Mental Ray settings would translate over from Maya.

Thanks for your help.

When you render frames are you using a compressed format? Compression is done per-frame and that may result in dancing/shimmering pixels when they are played back.

Examples would be beneficial.

-Avotas

I am using png images, so I think that all that I need to do is increase the min and Max antialias settings I am trying Min 1 and Max 16 as well as rendering it in HD as opposed to 720 x 405.

Testing a few frames this seemed to help a lot. We’ll see what comes out of the oven after this sequence is finished.

Thanks!