why the number of gamma is 2.2?what is relationship with the bitmap's gamma?

All bitmaps by default must be read at gamma 2.2 value, what we should specify in corresponding options. More about gamma correction and why we need it to be 2.2 you can read in this article.

i have done what you have shown but after rendering its shows perfect color in render frame buffer but after saving the file the jpg/ image gets more bright/white

Nikhil, this is because you save the image using gamma value that differs from one the system use to output to a frame buffer.

Particularly, if you use standard max's frame buffer, it saves not the shown image, but an image corrected with a gamma specified in a system parameters. Double check the Output Gamma value that is on the Bitmap section in the Gamma and LUT tab of the 3ds max system preferences. Make sure that you have exactly recommended in the tutorial value, which is 1, not the 2.2 or any other.

But anyway we recommend to use not the standard max's, but a V-Ray Frame Buffer. Using it do not cause such problems. It saves exactly shown picture.

Also make sure that you do not override the gamma value for jpg format when saving. The window of saving jpeg has a two special options: Use system default gamma and Override. The Use system default parameter must be chosen.

In any case we strongly recommend to read the full Using gamma 2.2 tutorial and find the detailed description of all possible issues

Hello,
some users might ask" why the hell my gamma setting does not seem as calibratred , the gray box is clearly visible even though i have input 2.2 to it."

i think you should mention adboe gamma for calibrating monitors as a first step.

infact i my self will be gratefull if you can recommend any better software solution other than adboe as it is absolute.

Hello bora,
The unified color display concept on all devices and monitors is a truly great thing. But, unfortunately, this approach is very idealistic. In spite of many steps performed to achieve the overall color display similarity there are differences, and sometimes very evident.

Not many 3d artists are critically interested in ideal display of their images on the ideally calibrated monitors, as often their renderings are shown not only on their monitors, but on usual, as a rule, not calibrated monitors of their clients and colleagues.

But anyway, the desire to make your monitor and visuals have ideal uniform colors is very appreciated. We ourself have calibrated monitors with adobe gamma. This is the way of progress and we hope the technology will achieve it one day!

Really very nice and detailed tutorials,..........thnx a lot for sharing these.........

You're welcome, Seema

can we set Gamma setting after applying all texture and material
and what vray color mapping we can use or any color mapping i can use. Thanks

Hi HAMZA,

You can change the Gamma setting any time you want, it is used on the rendering, not on creating, stage.

As for the which V-Ray color mapping to choose please read by the given link.

Hi , i got some problems in process of renderin', some models are rendered with kinda segments,sometimes in some scenes only, what's reason?

Bahodir, there are plenty of reasons, but we can't help you unless we know the exact situation. The segments is surely not the Gamma setting issue.