Reflection changes from Frame to Frame in Animation

[131bpmoffice]

Hi everyone,

I really need some help on this one,
I'm rendering an animation with quit simple materials, but 1/2 frame have a different reflection and lighting.

Find attached an extract of the animation where you can see it sort of blinking, like if my lights where in a constant rotation but there are not !
Lights and materials aren't animated or programmed to change, so I don't know where the problem is.

Thanks a lot for your help !

[TomG]

Looks like flicker from the Cache. First, be sure the Cache mode is set to "Animation (flicker free)" rather than Still frame. If that is done already, then you may want to look into saving and reusing the Cache,

(same applies for the 4K Cache even though the video only shows the UHD Cache).