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Zed Redgrave
Registered User
Join date: 3 Jan 2007
Posts: 5
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02-05-2007 17:07
Can any body explain how to make a shaded texture for say a window? Like a stain glass effect where you can see throught the glass colors.
Ive got the hang of Alpha channels in a way and can cut out textures etc, but if anybody a can show me the way I would be so greatful!
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Chip Midnight
ate my baby!
Join date: 1 May 2003
Posts: 10,231
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02-05-2007 17:36
If you haven't already, read through the sticky thread about alpha channels at the top of this forum.
The short answer is that the alpha channel represents transaparency as a grayscale value. Black is completely transparent. White is complete opaque. Shades of gray in between are semi-transparent.
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Bea Georgette
Registered User
Join date: 24 Nov 2006
Posts: 7
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03-23-2007 05:32
Zed,
I've had a small amount of success by simple means.
For example, if you have a photo of a stain glass window, typically it is taken from inside with the sun/light source at the back. Take this photo into PSP or photoshop and then make a copy of the layer. This copy you then make grey-scale after which you play with the contrast and brightness. When it is fairly contrasy, ctrl-A will selecto the whole image ready to paste into the alpha channel. Then that's it. Save in the normal way as TGA and pay your 10L$ for the upload. It gives a pretty good effect without careful scuplting and painting of a bespoke alpha channel.
Hope this helps.........
Bea
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Bea Georgette
Registered User
Join date: 24 Nov 2006
Posts: 7
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03-23-2007 05:33
Oooooooooooops....
Forgot to say: You have to invert the image before copy/paste to the alpha channel. Silly me.
Bea
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