Exterior Animation Flickering in Shadows Issue

[carlwilliamsvisualisation]

Hello,

I am rendering a series of exterior animations and am getting flickering in shadow areas behind trees throughout. I cant seem to fix it no matter what I try, I saw something about 'turning off adaptive light solver' in another thread but this was from 2022 so I'm wondering what the best options are for me to try now. I have attached a small clip showing what's happening. Its not just the flickering either, the shadows of the trees are almost sliding from side to side and their intensity varies frame by frame.

I've tried the usual things, making sure 'Animation flicker free' preset is checked, running path tracing as a primary and secondary light solver, rendering higher res and downresing afterwards.

Many thanks,

Carl

[Aram Avetisyan]

Hi,

We will need the scene to properly investigate this.

Meanwhile, try toggling Legacy environment map filtering and legacy medium resolving in performance tab (development settings), also enabled Accurate Sampling in Render Settings > Scene environment.

[davemahi]

Is this rendered local or on a farm?

[maru]

You could still try changing the adaptive light solver and adaptive enviro sampler settings as instructed here: https://forum.corona-renderer.com/index.php?topic=44976.msg233516#msg233516

It looks like the flickering happens only on the grass and only in the shadows cast by the specific trees. Maybe something is wrong with the grass and/or tree leaf material? Maybe it is using refraction instead of opacity?