Hi, what's the setting for volumetric light to build in HTML5

[anonymous_user_ce68d21a]

Hi, all. I’m trying to do a lighting visualization, here’s the visual for windows exe build.

Here’s the visual for my html5 build.

Question1: What’s the setting i have to do to get the volumetric fog and the lighting effect?
Question2: How can i improve quality for html 5 build?

Any help is appreciated, thanks!