Flicker in Shadows

[Pavan83]

Hello Guys,

I have been trying all the possible options that I know to fix the flicker in shadows. I have animated clouds in the scene. I tried to render using GI cache still does not solve the issue. Need help on solving this. Thanks in advance.

I have attached the Quicktime file and cloud settings.

[Oshyan]

It's very hard to tell with the low quality Quicktime, there are big, square compression artifacts. But the animation settings are not going to help you fix flicker issues, they will generally be caused by render settings. So we'd need to see your cloud Quality and Optimization tab, as well as your render settings (antialiasing, etc.). Or just post a .TGD.

- Oshyan

[Pavan83]

Hello Oshyan,

Thanks for the response. I have attached the file. Please check it.

[Oshyan]

Your anti-aliasing is too low, it will cause a lot of noise and flicker. Try at least 4AA, but you may need 6. Start with default values for Pixel Noise Threshold. Also I suggest using Robust Adaptive Sampling if you can, and upgrade to 4.4 if available. 

If you still have flicker after increasing AA, you may need to increase Cloud GI Quality (in GI settings, GI In Clouds), and possibly Ray Marching Quality (in cloud layer's Quality tab).

- Oshyan

[Pavan83]

I did a render in high quality settings with AA of 12  and Micro poly detail of 8, but still the flicker was there. I will try a render with increased GI quality.

[Oshyan]

You're encountering 2 different issues here: volumetric shading noise and GI/lighting flicker. The first is primarily resolved by increasing sampling in various ways. Higher AA helps, but you can better target the volumetric cloud quality specifically by increasing Voxel Scattering Quality in GI Settings. The lighting flicker, if it remains after you get rid of noise, is probably due to needing higher Cloud GI Quality. v3 clouds like Easy Cloud are not yet cached, so lighting can't be fully blended between frames using a GI cache. This should be an option in the future, but in the meantime you do need to increase Cloud GI Quality to avoid flicker in some cases.

And of course, make sure you are using GI caching and blending caches as well. This will smooth out the lighting contribution that comes from the environment and atmosphere.

I have attached a .TGD with some recommended settings.

- Oshyan

[Pavan83]

Hello Oshyan, 

Thanks for your inputs. I was able to solve most of the issues. Hoping to solve few other issues with the help of these previous threads. Where most of the stuff regarding Shadow Popping and flickers  were discussed.

https://planetside.co.uk/forums/index.php?topic=16336.15  

https://planetside.co.uk/forums/index.php/topic,22908.45.html