Why is light showing through a solid mesh object? I'm creating an animation showing a wok with fire beneath it.  The wok is a simple model--a mesh circle that I formed into a bowl (wok) shape.  I used the quick smoke effect to create a nice fire right beneath the bowl, like the bowl/wok is on a stove top. 

The problem is that the rendered image shows some of the light from the fire penetrating through the bottom of the wok.  It's not bright but, looking down at the wok, it is glowing in the area closest to the fire emitter beneath it.

How do I make the wok completely impenetrable to the the light from the fire?  Why is it allowing the light to glow through to begin with?

Thank you!
You need to make the bowl a collision object for the fire. With the bowl active, in the Physics tab click Smoke, then Collision. The collision type should be set according to what you do with the bowl. Static if remains still, Animated if you animate it using keyframes or drivers and Rigid if it has rigid body physics enabled.



You may also need to increase the Subframes setting for the emitter, to get higher accuracy to prevent flames to pass through the bowl between frames.



Here the bowl has collision enabled.



And here is doesn't.