Ultra White Material

[Neil Woodhouse]

Greetings All,

 

This is one for the guys who work with exteriors.

 

I'm doing a viz for a client, to be prercise a 'Spanish' Villa. I'm struggling to get that blinding white colour for the walls. I'm using v-ray 1.5 RC3.

 

I'm torn between lighting with a Target Direct, IES Sun, VRay Sun or Dreamscape. Any suggestions? Additionally what texture map is reccomended.

 

Regards

 

Neil Woodhouse

[Crazy Homeless Guy]

i lost the original link to chaos forum post, but vlado provided a solution for achieving exact color of any color in a scene. i use this method to determine the white point of an image all the time, and it works great. you could use it to keep your white material white, and possibly add some glow in photoshop to get a blinding look.

 

..or maybe it should be a really bright white, with a hair of yellow. i would sample an image in photoshop of the look you are wanting to acheive. then make that your material, and use vlado's method to make sure that color is spot on.

 

Originally Posted by Vlado

I had to deal with this recently, so I thought it may be useful.

 

The problem:

 

We want to obtain an exact RGB value for some (small) surface in our image. Let's say the RGB value is xr, xg, xb which range from 0 to 255.

 

The solution:

 

1) Render the scene in any way you want with any settings you want, but make sure you use Linear color mapping with 1.0 for both Bright and Dark multipliers and the "Clamp output" option is off, and you are using the V-Ray camera "Exposure" setting. It would also be handy if you render to the V-Ray VFB.

 

2) Measure the RGB value at the pixel you need to match. If the values are, let's say (pr, pg, pb) again from 0 to 255, adjust the V-Ray camera "White balance" to be (pr*255/xr, pg*255/xg, pb*255/xb) and multiply the camera ISO setting by (xr+xg+xb)/(pr+pg+pb).

 

Note that this works only for Linear color mapping. In principle it can be done for any color mapping, but the numbers are hard to find by hand.

 

Best regards,

Vlado

[laumikey]

This might help... http://www.highend3d.com/3dsmax/tutorials/rendering/vray/147-2.html

[Neil Woodhouse]

As ever my thanks to those who responded. I did a little bit of head scratching on this one and came up with this solution that works exactly as i wanted it.

 

1. The 'Fog' setting in the Vray material editor i set to 0.

2. The 'Blur' setting i set to 0

3. Went to the output drop down enabled the RGB and pushed the left hand side of the graph right up until i got what i wanted. Seems -as usual- the simplist of solutions aren't always that obvious.

 

Works a treat!!

 

Again thanks to those who responded.

 

Regards

 

Neil