Light Gels/Gobos

Hellish-Abaddon

Hey guys, I was wondering if there is a way to add light gels/gobos to the spotlight in Studio 4.5
The only thing I managed to find while searching are UberSpotlight and a tutorial using the point light.
The UberSpotlight is more what I'm looking for, but is there no way this can be done without purchasing UberSpotlight?

SandmanGFX

I'm trying to create a Spotlight with a texture option in Shader Mixer at the moment. No luck so far. Then there is also the Shader Builder tab, which I have never played around with before. Try it yourself and let us know if you had any success.

Richard Haseltine

A crude approach is to invert the gel map (any image editor should be able to do that) so that you have a negative version, then apply that to the Opacity Strength of a plane and position the plane in front of the light (with shadow casting on of course)..

SandmanGFX

Sorry, I can't get it to work. I've tried out changing things in shader builder also now. Seems to be really advanced stuff.
I mainly use LuxRender via Reality for my renders. It has very nice options regarding lighting. I'd use 3delight more if I actually knew how to create good shaders. Wish I did!

Morpheon

Richard Haseltine said:

A crude approach is to invert the gel map (any image editor should be able to do that) so that you have a negative version, then apply that to the Opacity Strength of a plane and position the plane in front of the light (with shadow casting on of course)..

This trick worked for me in DS4.6P (and thanks for the info, Richard -- I'd been trying to puzzle this out myself).

Create a plane, and apply an inverted copy of your gobo texture to its Opacity property. Position this plane in front of a light set to cast shadows, and you should be good. For example, I created a white square with a black crosshairs on it, and when I applied it to the plane's Opacity property, it became four black squares with a transparent crosshairs separating them.

Using UberSpotlight, apply your gobo texture to the light's Color property WITHOUT inverting it, and you should be good. It will still cast the gobo even if the light isn't set to cast shadows, but it'll look funny without the light casting other shadows.