Render buckets left in fog

Hi,
Has anyone seen this before, render buckets squares are remaining in render?

Thanks for looking.

try turning your min aa rate to a value higher than 1.

Worked a treat, thanks.

yes, with only one aa sample, sometimes vray doesnt find any fog “particles” on its first round of ray firing.. so assumes its finished sampling. or something.

highly technical answer there :wink: