Creating Believable Materials - Photographic Rendering with V-Ray for SketchUp - page 211

The good thing about the way the Standard material will now work is that although
the diffuse map is the color we see displayed in the SketchUp viewport, we can go
ahead and add a VRayBRDF layer to the material, effectively giving us a diffuse
override option. To set that up and apply a color of our choice to the walls, let's per-
form the following steps:
1. Right-click on the Walls material and choose the VRayBRDF option from the
Create Layer flyout.
2. In the Diffuse controls at the top of the VrayBRDF rollout, click on the color
swatch and set HSV values of 53 , 136 , and 203 , respectively.
Note
These settings will push the light reflecting (reflectance) capabilities of
this material to about 80 percent, which means that we are able to
bounce quite a bit of light around the environment. Of course, color
choice for an interior space such as this will always be something that
people have strong opinions on, so please feel free to work with whatever
color hues you prefer here. Just keep in mind that a higher value setting
in the materials color will push the light bounce to unnaturally high levels
that can introduce very obvious color bleed problems, especially so if ad-
ded in tandem with an increase in color saturation.
3. Down in the Maps rollout, put a check in the Bump option and then click on
the map button.
4. In the map dropdown, select the TexBitmap option. Then, from the browse
window, select the same Wall_Stucco_Bump.bmp file that we used in the
diffuse slot a moment or two ago and click on Open .
5. Click on OK to exit the V-Ray texture editor window.
With our Diffuse color and bump map now in place, if we click on the Wall Up Close
scene tab and then (making certain that we disable region render first) hit the render
button up on the toolbar, we get a nice close up view of the subtle Bump effect that
we have created. Of course, the bump value could be pushed further if we wanted to
create a somewhat stronger effect, but what we have seems to be working just fine
for now.