Quality Control - Photographic Rendering with V-Ray for SketchUp - page 298

Cleaning up our GI solution
Now that we have reviewed the quality of direct lighting and shadows in the scene,
let's move on to cleaning up our GI solution so that we can call the final lighting for the
scene done. In this instance though, we will want to take our review renders without
materials enabled, leaving us free to focus solely on the GI. The last thing we want is
to be unnecessarily increasing GI parameters if what we are seeing are in fact noise
problems coming from elsewhere in the scene.
To do that, we need to turn our material override function on, so let's perform the fol-
lowing steps:
1. Open up the option editor and jump into the Global switches rollout.
2. In the Materials section, we need to enable the Override materials option,
while disabling the Glossy effects option at the same time.
3. Once we are done, we can close the option editor, return to the Wide Shot -
35mm scene tab, and again hit the render button.
Note
The reflection/refraction option can stay on so that we can see if any of the
GI rays passing through our glass material are causing any problems. The
"Maps" option needs to remain enabled so that the HDRI being used by
the Dome light still works.
Reviewing our GI render
In this instance, what we get from our initial render looks pretty good. In fact, the only
immediately noticeable problem would be the large splotches that are most clearly
visible on the ceiling and the wall just above our glass door. Now, we could easily