Lighting an Exterior Daylight Scene - Photographic Rendering with V-Ray for SketchUp - page 131

One reason for the difference can be seen if we click on the M icon up on the V-Ray
main toolbar and open up the V-Ray specific material editor. As you can see, we cur-
rently have just two V-Ray materials assigned in the scene: one has a diffuse grey
value set to give us a reflectance or light bounce value of 35 percent, while the other
uses a grey diffuse color that gives us 70 percent reflectance.
Note
Typical target reflectance values for concrete, which I tend to use as a generic
material when setting up exterior lighting rigs, would be between 40 and 60 per-
cent.
As seen in our second render, these values used in V-Ray for 3ds Max or Maya
would give us a decent, sunny-looking starting point from which we could tweak both
our material and exposure settings in the scene. So what is there in our scene's cur-
rent settings that would be causing things to work differently in V-Ray for SketchUp?
The answer is found in a color mapping option that is on by default in V-Ray for
SketchUp, but off by default in the 3ds Max and Maya versions.
To take a look at that, open up the Color mapping rollout in the options editor. The
setting we are interested in is the Linear workflow checkbox which as you can see
in the following screenshot is enabled by default: