what gamma correction

[kasalin]

Hi,

do you change the gamma value (2.2 standard) or not....
in TG classic I always changed the gamma to about 1,5  (good for me)

[FrankB]

I experiment with it in some scenes. I usually set it to anything between 2.0 and 2.2, very rarely below 2.
You just have to figure out what looks best per scene.

Regards,
Frank

[Oshyan]

I find it better to render and save out to EXR and adjust gamma, exposure, etc. dynamically, or even tone map.

- Oshyan

[Walli]

I second that, render to exr and you can do all kind of that color/brighntess/contrast manipulation without destroying the picture.

[Rhalph]

I think I had some problems with EXR and Photoshop, I had more banding than in the BMP saved render.
Anyway, even if I do two renders a year (), as in TG classic I usually set gamma to a low value.

[kasalin]

what does render to exr mean

[Rhalph]

EXR is a file format.
It is used for HDR images: http://en.wikipedia.org/wiki/OpenEXR

Saving to EXR will allow you to store much more color information than in BMP, provided you have an image processing software that can open it.

[kasalin]

how do I get such high images

[kasalin]

resumme: you render and save it by default... then you change the contrast, etc in a graphics programm , correct ??

[leafspring]

Depends on what you are planning to do.
To actually view or print your image on a standard monitor/printer you have to convert it to a format with 8 bit color depth per channel (HDR is 16 bit). To do this you use a graphics program (like Photoshop). Typically you would use tone mapping to map the 65535 color values per channel to 255 per channel.

[kasalin]

Wonderful and very qualified answer.... top !!!! thanks !!

[Oshyan]

After you render, when you go to save the image, there is an option to choose the format. Simply change it to EXR. You will need a program that can open and adjust it properly. Photoshop works well, XNView will open and do some basic manipulations, there are many others.

- Oshyan