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View Full Version : Removing texture edge shadows

cosmo_cheese
06-30-2003, 11:32 PM
Sorry if this is an old one guys, but it's late and search boxes and google aren't helping me much today...

I remember seeing somewhere once a really quick simple technique for getting rid of shadows on the edges of photos (you know, big flash in the middle, fading to dark at the edges) to make them more even and flat to use as tiled textures. But I'm damned if I can remember!

Cheers for any help you can give me.
Ian Jones
07-01-2003, 02:46 AM
You could try duplicating the photo, desaturating the duplicate and then inverting it. Use this as your negative luminance and play with blending modes to put light into dark and dark into light. This will effectively lower the conrast and I don't think it will really work all that effectively but you could try. Maybe if you blurred the negative so that only the broad changes of tone would then affect the luminosity. There is a filter that actually does this but it destroys colour. It is filter > other > high-pass. It will let all the high frequency tonal ranges (detail and sharp tonal changes, eg.. texture) pass through and it will remove the low frequency (smooth tonal changes, eg lighting). This will leave a mostly grey image with detail and no broad lighting differences.

Not sure if thats what you were looking for.. but its hard to say without looking at the image you need to manipulate.
*RIBBLER
07-01-2003, 08:56 AM
I think that (http://www.3dgate.com/techniques/2001/010625/0625hajba.html) is what you're looking for! ;)
cosmo_cheese
07-01-2003, 09:42 PM
Ta *Ribbler, that's exactly the one I was looking for!!:thumbsup:
Ian Jones
07-02-2003, 02:49 AM
Yep thats where I learnt about it. I lost the link so thx for finding it.
*RIBBLER
07-03-2003, 11:42 AM
No problem!
I'm always pleased to help!
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