CGTalk - 50%gray to 0 Black

donvlatko

12-13-2004, 11:24 AM

hello,
I am haveing a problem with my

displacment map. As you all know

when you make a disp. map in ZBrush,

50%gray is a 0 but Maya render and

Renderman need a black to be 0. I saw

in manual that you can make a positiv

and negativ map and make a shader

in maya. I don't know how to make that

in Renderman so, is there a way that

50%gray make a black color in

Photoshop?

thanks

Skjoldbroder

12-13-2004, 02:52 PM

you could try playing with the brightness/contrast settings? I know this is not a very exact way of preserving your map, but at least you'll be able to take it down somewhat and hopefully keep the details in the displacement. if you do it carefully, you should be able to avoid losing too much of the detail.

http://www.skjoldbroder.dk/fisse/test2.jpg

jbw

12-13-2004, 05:08 PM

If you want to make that 50% grey background black use levels (Ctrl+L). Once the levels dialog is open click the low-lites dropper (furthest left eyedropper below the ok, cancel, auto buttons) then L-click once on the 50% grey background. Your image should change to reflect the eydropper selection, now click ok. You should now have a 0 black background.

Enjoy,
jbw

donvlatko

12-13-2004, 05:28 PM

thanks jbw I will tru that...

sorry plaf that will not work in my case:(

jbw

12-14-2004, 08:31 AM

No worries,
Hope it does what you want.

ta,
jbw

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