Creating Believable Materials - Photographic Rendering with V-Ray for SketchUp - page 214

ceiling by way of color will show up in the reflections on both the floor and other ob-
jects in the scene as well as contributing to color bleed in the scene. For these reas-
ons, I feel that taking a neutral approach for the ceiling material will probably work
best.
As I also want to create a similar textured feel to the ceiling as with the walls, now
seems like a good time to make use of another feature made available by means of
the right-click menu inside the V-Ray material editor. To go ahead and do that, we
can perform the following steps:
1. Right-click on the Walls entry in the material editor list and choose Duplicate
Material from the menu options.
2. Right-click on the newly created Walls1 material and select the Rename Ma-
terial option.
3. In the Rename Material dialog box, call the material Ceiling and then click
on Ok .
4. Click on the Diffuse color swatch on the ceiling material's VRayBRDF layer
and set the color to HSV values of 60 , 3 , and 210 .
Note
These settings will push the light reflecting (reflectance) capabilities of
this material to about 82 percent, again improving the movement of light
around the environment. Of course, we do need to be careful with reflect-
ance values here as once we take the properties beyond those of realist-
ic material behavior, we will end up detracting from rather than adding to
the potential for photorealism in the render.
5. From the SketchUp toolbar, grab the Select tool and then double-click on the
ceiling geometry to open the group and then single-click to select just the
ceiling plane itself.
6. Back in the materials list, right-click on the Ceiling entry and use the Apply
Material to Selection option.
To add a little extra variety to the texturing at this point, I want to add a slightly dif-
ferent bump effect to the ceiling by using a V-Ray noise map. To do that, we can
perform the following steps: