I am getting noise due to motion in grass. I don't know how to control it. I have changed the samples and it increased the render time from 40 minutes to 3 hours but no difference. Can anyone please tell me how to get rid of these noise.
( Exr file including passes, screenshot of sample i used regular one & increased one is also Attached)
If you are rendering really fine details that are motion blurred, such as blades of grass, you are probably seeing aliasing, not noise. Increasing ray samples will generally have no effect on aliasing. Increase pixel samples to over sample the aliasing parts. Alternatively, remove the source of aliasing by preventing rendered features from becoming smaller than a pixel.