Glass receiving shadows

[digitarch]

Dear vray-folks,
I would love to fake Glass to receive shadows (helpfull with architecture to give the glass/window position in the wall more depth). Somebody have an Idea, maybe some layer like "shadow on object"
Matthias

[joconnell]

Will this not do this automatically if the windows just have less refraction? It's the usual physically accurate, energy conservation stuff, you'll need to turn down the refraction strength of your glass to give it more of a diffuse surface for the shadow to lie on, which will in turn cut down the amount of light that travels through the glass and may darken your render a bit.

[digitarch]

hmmm, that´s the problem of "real" glass - as its transparent it doesn´t receive shadows. I´d love to have transparency AND still shadows on it. As the vray shadow renderelement also does not show shadows on glass that also doesn´t help.... any nice fake trick?

[Neilg]

Render out a separate pass for it. no gi, mid grey, save raw light pass.
You can do this even quicker by rendering the glass object as a pass - select the glass object, invert selection, & change the vray properties to matte & with an alpha of -1. Shouldn't take more than a minute to setup and it'll be very quick.