how to avoid burnouts when using Don't affect colors (adaptation only) on?

[lukx]

Are there any tricks when using LWF and Don't affect colors (adaptation only) on?

[LarsSonparsson]

Sorry, but I don't really understand what you mean.
Are you saving to exr or some other float format?
I have no problems with that option.

[lukx]

With "DOn;t affect colors (adaptation only) color mapping settings doesn't affect anything so when I lower burn value nothing happens and I got bright white areas.

[LarsSonparsson]

This might be a stupid question, but why are you using " dont affect colors", if you want those settings to affect colors?

[raymarcher]

The don't affect colors disables all color mapping modes and gives only the default linear mapping result. What you can do is render out in 16 bit and apply an reinhard adjustment curve in post production. Search on the forum to find out how that curve looks.

[rivoli]

well, yes, that is kind of the point of "don't affect colours". the option is meant to be part of a completely linear workflow, if you want to apply any other colour mapping, then, as lasse suggests, don't use it.

[Morne]

problem is that if you don't use it, you loose a lot of saturation and the image comes out even duller in the vfb than what is already common with LWF and also like lukx said, you struggle with burnt out areas.
Take a look at my post here which is somewhat related:
http://www.chaosgroup.com/forums/vbu...-file-versions

The idea is that you can use "full linear" including dont effect colours, and then just apply burn in the vfb after the fact. That way you can render once without having to render test various burn settings without dont effect colours.

[rivoli]

I'm sorry, but I'm not sure I follow here.. with "don't affect colours" on, vray will not apply any colour mapping to the render, but still perform the correct adaptation based on the given gamma settings. how can this lead to a loss of saturation?

[lukx]

hmmm this is interesting... got to find out how this curve looks like

[Morne]

I'm sorry, but I'm not sure I follow here.. with "don't affect colours" on, vray will not apply any colour mapping to the render, but still perform the correct adaptation based on the given gamma settings. how can this lead to a loss of saturation?

My tests show that if I don't use "dont effect colours" the image comes out more grey than if I do use "dont effect colours"

[lukx]

are those the curves?http://www.chaosgroup.com/forums/vbu...323#post372323

I have to match ps curves?

[rivoli]

My tests show that if I don't use "dont effect colours" the image comes out more grey than if I do use "dont effect colours"

assuming you're doing any colour mapping, the only difference is that with "don't affect colours" on, you're actually discarding any effect said colour mapping is having on the image. so yes, in this case the option will make a difference.
if there's no colour mapping involved, then the option doesn't do anything.
I'm just a bit confused because the option don't affect saturation per se, it's more like a switch with which you can turn on or off colour mapping from being applied to renderings. well, sort of..
as long as lwf producing dull images, if you adjust materials and lighting accordingly, it shouldn't be a problem.

[simmsimaging]

I'm wondering if this is similar to the problem I have with LWF: i totally understand that "don't affect colours" shouldn't, but I also find that it's very difficult to create images in LWF that don't have highlights that are very blown out and almost always I have to try and correct them back in Photoshop.

It would be nice to have the effect of the colour mapping/tone mapping but not have it clamp colours. That would give the quick access to the tone map look that users are trying to get with Reinhard etc, but not give up the flexibility of full float data.