Wed, Feb 5, 1:51 AM CST

Renderosity Forums / Poser - OFFICIAL

All Forums

Welcome to the Poser - OFFICIAL Forum

Forum Coordinators: RedPhantom

Poser - OFFICIAL F.A.Q (Last Updated: 2025 Feb 03 12:46 am)

Poser Gallery - Poser Freestuff

Subject: image map>invert the green channel via nodes?

stonemason opened this issue on Feb 12, 2009 · 3 posts
Back to Forum Print
stonemason ( ) posted Thu, 12 February 2009 at 6:40 AM · edited Thu, 09 January 2025 at 3:42 AM

hey guys..anyone know how to invert the green channel of a bitmap via nodes?

as an example http://stefan-morrell.com/SKWallBN_Flipped.zip
one of the normal maps in there has the green channel inverted via photoshop..is it possible to do that with nodes alone?

Thanks
Stefan

Cg Society Portfolio

bagginsbill ( ) posted Thu, 12 February 2009 at 7:11 AM

Yep.

Use a color math subtract node, Value_1 = WHITE, Value_2 = WHITE->your map. That is a negative of your map - all three channels inverted.

Now one more color math Add node, Value_1 = MAGENTA -> your map, Value_2 = GREEN -> your subtract node (the negative).

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

stonemason ( ) posted Thu, 12 February 2009 at 7:30 AM

that worked perfect!..many thanks 👍

Cg Society Portfolio

Privacy Notice

This site uses cookies to deliver the best experience. Our own cookies make user accounts and other features possible. Third-party cookies are used to display relevant ads and to analyze how Renderosity is used. By using our site, you acknowledge that you have read and understood our Terms of Service, including our Cookie Policy and our Privacy Policy.