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VRay for SketchUp Manual
Other Parameters Within The Reflection Layer
Every object has a certain degree of reflection. Some are very strong, and some
are weak. But this doesn't mean we have to apply reflection to every single object
in the scene because that will increase your rendering time significantly.
Reflection
Glossiness
You don't always get clear reflection from reflective material. Objects like
matte finish metal, wood and some plastic materials do not reflect the
lightsource clearly due to its uneven surfaces. This is because the uneven
surfaces create many reflecting angles for light to bounce around. So the
highlight is not as sharp if compared to reflection from smoother surfaces. The
best way to create this kind of rendering quality is playing around the setting
of both Highlight Glossiness and Reflection Glossiness.
The default value for both Reflection and Highlight Glossiness is 1, which
means that the reflections will be perfectly sharp. Once the value is decreased
below 1 the reflections begin to become blurry. A value of 0 would mean that the
reflections are completely blurred, and this would look similar to a material
without a reflection layer at all. Setting this for regular materials would
cause extremely long render times. A good range for creating glossy reflections
is between .5 and 1. At values below .5 the effect is similar to a material
without reflections.
Below are results from combinations of various intensities of Reflection
Glossiness and Fresnel IOR.
Samples of Reflection Glossiness
Reflection Filter
The filter color is used to apply color to reflections. You can see that by
changing the filter color on each of the renderings below the color of the
reflections change. The magnitude of this effect will change based on the
strength of the reflections themselves. In the case of materials which are very
reflective, filer color may be an effective way to change the object’s
appearance.
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