if I put a light inside of a non-transparent mesh, will its light be blocked?
Yes if you setup a shadow generator.
so I have this golden boomerang that I throw around in this VR scene → Login • Instagram
let’s say I want the boomerang to illuminate the meshes that it comes near… what do you think is the best way to do that? should I attach two (invisible) lights to its top and bottom e.g.?
I originally put one light inside but yeah the mesh is blocking it…
Yes, attaching the light(s) to the object seems the way to go.