Forum: Photoshop


Subject: Help: Lighting & Channels

Josh101 opened this issue on Apr 18, 2003 ยท 4 posts


Josh101 posted Fri, 18 April 2003 at 9:41 AM

Hi, I'm trying to get through a tutorial at thinkdan.com about making 3D rings and am having some trouble. The basic effect is that you create a ring somehow, then Ctrl+click on the ring's layer to highlight it. You go to the channels palette, hit the Save Selection As Channel button, then you click on the Alpha 1 channel. You then do a Gaussian Blur and adjust the curves. All that works fine for me. The next step where you are supposed to do a Lighting Effect is where I'm having problems. The Lighting Effect filter isn't even available. What do I need to highlight or click on to be able to use the Lighting Effects? I can make them available if I am not highlighting my alpha channel, but then of course the lighting doesn't create a 3D look. If anyone can offer any assistance on this I would appreciate it. I'm using photoshop 5.5 and the tutorial is located at:

http://www.thinkdan.com/tutorials/photoshop/ring/

Thanks in advance,
Josh


mpalash posted Fri, 18 April 2003 at 10:13 AM

from what i can gather is the intended course of action: 1> select the layer with the ring (select all channels - switch to the channels tab and click on RGB) 2> filter render-->lighting effects 3> adjust the other light parameters as you want. there'll be a field where you can specify a channel you want the filter to use as a bump map. inthis you would want to load the channel you had tweaked earlier with curves (Alpha 1 i guess) 4> adjust the parameters and apply. experiment to get the effect you desire. 5> post back here if further help is required. :-D


Josh101 posted Sat, 19 April 2003 at 2:25 PM

Thanks mpalash. I was able to get it to work after reading your reply. I forgot about the option of choosing Alpha 1 in Lighting Effect so you can use it as a bump map. I still need to make some adjustments before I'm satisfied with how the image looks, but at least it looks 3D now. Thanks again, Josh


mpalash posted Sat, 19 April 2003 at 2:39 PM

anytime man :-D