translucent effect by height?

[manamana]

Recently I've seen a number of architectural renderings that show potential future development with a translucent effect that gets more and more transparent as you go up in height. Ex:

http://static.worldarchitecturenews....Aerial_Day.jpg

I'm wondering about strategies for getting something similar out of vray? Easy to do with two renderings (one with future building one without) and comp in photoshop, but wondering if there's a way to do it hitting render only once.

Thanks.

[deanfitton]

Re: translucent effect by height?

defo a PS job my friend,

there may be a clever way to do it in vray, but i imagine the amount of test renders needed to get the exact effect would be vast. so for all the time wasted in re-rendering, a quick job in PS job will suffice

kind regards

[fpedrogo]

Re: translucent effect by height?

Use a gradient map on the material. Could be on the diffuse layer on the transparency slot or on the refraction color.