Adding a Gel to a Light

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

THREAD CLOSED
 
Thread Tools Search this Thread Display Modes
Old 08 August 2012   #1
Adding a Gel to a Light

Please can someone tell me how to get an image gel onto a light in C4D - the manual says you can add as many as you like, but doesn't say how to do it.
I've tried adding the image to a material and adding that to the light as you would to a selection of faces... or entire object - but it does absolutely nothing.

I've searched throughout the options/controls for the light in question, and again can see nowhere to add an image to drive it...

Please can someone help?

(C4D 10.5 Win7 PC)
__________________
Fran

Measure your mind's height by the shade it casts.

Robert Browning (From Paracelsus)
 
Old 08 August 2012   #2
Add the image to the transparency channel of the material before you add it to the light.
__________________
The Third Party | Homepage | My Reel
"You need to know what you're doing before you start, and to start because you need what you're doing."
 
Old 08 August 2012   #3
Thanks - it didn't work to start with, until I put the same mat onto another light and realised the problem was that the 1st light had a tick in 'Shadow Caster' - while the 2nd did not.

It now works.

I then tried various combinations because I'd found someone using a gel for tree shadows who said put it in Alpha and turn everything else off. I tried this and it does work, but... well I didn't like it as much as in Trans.

What I did like was a combination of Colour, Diff, Lum, Trans, Reflect, Alpha and Spec Colour which brought out the blue as did trans alone, but also added more punch where Alpha alone had some unappealing yellows to it although it had better deffinition to the pattern than Trans alone did.

I also tried it with the image in Environment as well, but that washed things out again, so it was almost like it was with Trans alone, but a tad brighter.

As I want it to demonstrate the use of the gel - I prefer the top right with most of the options enabled:



Thanks very much for your help - you set me on the right road.
__________________
Fran

Measure your mind's height by the shade it casts.

Robert Browning (From Paracelsus)
 
Old 08 August 2012   #4
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
 
Thread Closed share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 01:10 AM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.