View Full Version : Choose Colour Space for Gradient?

03-03-2013, 03:53 AM
We all know how you can't get very far without using gradients! I've been using them a lot for displacements. The colour channels are esp useful for getting positions (see attached - I'm basically dynamically moving the one null to another) - but only when working in Linear Color Space. I understand why but need to work in sRGB, which obviously sends my colour channel numbers out of whack.

Is there a system that will swop the Gradient for something that uses absolute numbers, or is there another approach?

03-03-2013, 05:25 AM
Yeah... there was a bug in gradients (and a couple other nodes) with them not respecting/treating colourspace the right way... this could be due to that. Simple fix... shove a colour correct node onto the output, then u can gamma 2.2/0.454 (whichever) it as needed.

03-04-2013, 03:06 AM
Hi RH. Thanks for the tip, I thought this might be a solution but I can't get the positions to line-up in sRGB space and some very strange results occur when Positions go negative.

Out of the Gradient, I'm using db&w Simple Colour Corrector, Color into Color and changing the Gamma setting accordingly. Is this what you meant? I guess I could always split out the x,y,z into scalars and do it the long way.

When you say its a bug, should the Gradient node stay in either one colour space or the other, regardless of CS you're in?

03-07-2013, 12:11 PM
No wonder sometimes things just don't seem to work properly. If you were doing maths with any of the vectors you could get any result. Look at the difference!!!


Thanks for the info raw-m. :thumbsup:

03-11-2013, 05:35 AM
Hey XswampyX, just seen this (the email notification on these forums is a bit whack sometimes!). Thanks for the clarification, glad it isn't just me scratching my head!

Is this a bug or how it should work? Surprised it hasn't been noticed and tackled earlier if it is a bug.