Chaz wrote:
> If their mass was infinite, the cloth would be drawn towards the spheres and
> not the ground.

Inertial mass, not gravitational mass. In RL they are equivalent (big up
to Einstein!), but in raytracing we can fiddle about with physical laws
anyway we want. I'm betting the cloth simply falls straight down without
any reference to gravitational forces whatsoever.

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> I'm betting the cloth simply falls straight down without
> any reference to gravitational forces whatsoever.
You're absolutely right.

Maybe this would be a more realistic way of seeing the scene. The cloth is
very light and the spheres are glued to the ground.

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