У вашего броузера проблема в совместимости с HTML5
Hi friends now we are going to see "How to create fog scene "
1.Create your own environment
2. Then From "helpers" tab select sphere or box Gizmo.
3.Adjust such a way that it covers your environment & you can resize the radius or length.
4.Then tap 8 number -Environment dialage box appears
in that in "Atmosphere "add "fog volume"
5.In the below parameter click select pick gizmo
6.Now tap f9 for preview.
7.Follow the above tutorials and enjoy it