CG Tools - Wishlist

Barn Doors (Hotspot, Falloff):

When using vray lights, I frequently want to control how much light spills towards the edge of the area light.

Hotspot and Falloff

In 3dsmax, this is controlled by an artificial limit defined by a hotspot distance (full light), and a falloff distance (no light at all).

The Brazil renderer made this even more versatile by adding a transition curve, so you could actually control the curve of how the illumination transitioned between these two distances.

Standard Falloff Curve...

Modified Curve...

Result...

Modified Curve...

Result...

Barn Doors

I know that vray prefers to deal with real world features if possible, so if a hotspot / falloff is not possible, another possibility is a set of barn doors. While technically a different feature, it achieves a similar effect, which is to limit the light from the edges of the light source without changing the characteristic of the light itself. Here's a practical example of barn doors with a diffuser:

http://lowel.tiffen.com/edu/light_controls/barndoors.html

While a barn door can be used to directly cut off the light, usually one would use a barn door to softly remove light from a particular side. Maybe vray could have both...

4 square barn doors
a circular barn door that acts a little like the hotspot/falloff.

All barn doors would have a softness parameter to control how blurry the edge would be.

Here's a short video discussing barn doors (starts at 3:19)

https://www.youtube.com/watch?v=Qgq_AReemN4

If you agree with this wish, please show your support by going to the official Vray Wishlist and VOTE.