An interface bug, and subsequent confusions.

[cattt]

This is the Color Mapping tab's initial state when opening one file.



This is the same tab after rendering the file.



Which is the real explanation of the second bracket? What is it?

Why I ask it, see below

I found by changing the MULIPLIERr to 0.4545 I can mange to get the seemingly right looking image rather than tempering with the second value. But seems against what have been told in the Linear Workflow thread http://www.asgvis.com/index.php?opti...d=24&Itemid=57



It said in order to get the right Color Mapping, the second value "Inverse Gamma" should be set to 0.4545 to get the right result. Through some internet research I knew this move is to encode the image with a reverse Gamma in order that it can be displayed right in the Operating System, just the same as many file format had done, reverse Gamma encoded, for example JPG. But why change it will only make the image brighter which is against the suggested result in the "Linenar Workflow" thread?

Can someone be any help? Thanks!

[kwistenbiebel1]

Re: An interface bug, and subsequent confusions.

Actually I can't see the point of those gamma correction and/or linear workflow things being in the panels.
They seem to confuse everybody a lot and you need a degree in nuclear physics to really grasp how it all works.

None of the other render engines bother with these kind of things as they automate it.
I don't understand why Chaosgroup still makes it so damn complicated.

[dalomar_cg]

Re: An interface bug, and subsequent confusions.

Please don't worry about adjusting gamma correction through the color mapping rollout. Its confusing, and we've changed our system of gamma correction anyway.

We've gone through and simplified the whole gamma correction system, and its actually enabled by default. In the bottom right corner in the Global Switches rollout, you'll see all of the gamma correction parameters. There's the options for the input gamma (the amount to change maps and colors) and the output gamma (the amount to change the rendered result), which by default are at 2.2. There are two other important options as well; Correct LDR Textures and Correct RGB. Both of these will allow inputs (texture or color) to be affected by the input gamma. By default these are both be enabled, and unless you've gamma corrected your whole workflow (textures, monitor...) then you should definitely leave these enabled.

After that, you really don't have to worry about it anymore, and that was the point. Make it easy so you set it once and let it be. This also allows you to work with color mapping settings completely separately, which simplifies them as well.