Converting a non-LWF Diffuse Color to its equivalent in LWF Gamma 2.2

First topic message reminder :

Did any of you encounter washout color of material when using LWF Gamma 2.2? This happens when we merge 3D models to the scene which were not color corrected, or in other way they were made without using LWF Gamma 2.2. Example are 3D cars from *****MOTION haven't we notice it, they look washout in LWF.

So, I made this tutorial on how to convert the diffuse color from a non-LWF to its equivalent color in LWF Gamma 2.2.

FIRST METHOD USING VRAYCOLOR

Here is an example of diffuse color without Gamma/LUT Correction having an RGB value of 255,100,100. Look closely on the color.


Now we have tick the Gamma/LUT Correction with Gamma 2.2, Affect color selectors, Affect Material Editor, input Gamma 2.2, output gamma 1.0. We use the same RGB values 255,100,100. We notice the color changes, this is due to the gamma 2.2, checking the Affect color selectors & Affect Material Editor.


We make another material. Click the diffuse and selecting VrayColor.



In the VrayColor, we put our RGB values 255,100,100 or just copy & paste the color. In gamma correction select specify & gamma value of 1.0 (see image below).


Now we will correct the color by changing the gamma value of 0.4545. This is the invert of gamma 2.2. As we can see the color changes. The RGB value 255,33,33 is the equivalent of RGB 255,100,100 in non-LWF.


Comparing our results, we can say that they are the same color but differ in RGB values.


We copy the result color in VrayColor or manually typing the RGB values. This our final result, the equivalent RGB value of diffuse color from a non-LWF.



We only use the VrayColor to serve as a Color Calculator of RGB's.


SECOND METHOD USING VRAY COLOR CORRECTION

We use the same sample RGB value 255,100,100. In the diffuse color, apply ColorCorrection.


In the color slot of ColorCorrection, copy & paste the color or you can type it manually but express the RGB values in decimals. Divide the corresponding values by 255. For our example, we express it as RGB 1.0, .392, .392 .


Preview of RGB 255,100,100 or RGB 1.0, .392, .392 without color correction.


Now we go to the lightness tab, click advance & in the Gamma/Contrast put the value .4545 (the invert of gamma 2.2). We notice the color changes. This the equivalent value of RGB from a non-LWF.


The second method is the easiest way. Now, we can start converting all our stock models. Lol!!!

Thank you for spending time reading this tutorial... Ciao!!!!!!!!!!!!!!!

Good day sir,tanong ko lang po,pano pag nag color bleed yung bitmap.kagaya po ng nangyari sa render ko,ano po ba remedyo nun?

Anoy_Datahan wrote:Good day sir,tanong ko lang po,pano pag nag color bleed yung bitmap.kagaya po ng nangyari sa render ko,ano po ba remedyo nun?

Gamitan mo ng vray override material...sa GI material gawing mong white or gray color...in my case I preferred to use middle gray 128...hope it helps. goodluck!