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VRay for Rhino Manual
Understanding V-Ray for Rhino's Default Settings
Rendering with the Default Settings
The Default Options in V-Ray for Rhino are set up so that certain elements of
V-Ray are already enabled. This is good because certain aspects that are
specific to V-Ray are already configured with a proper setting. However there
are a number of elements which are contributing to the final render, and it is
important to know what they are so that unwanted results are avoided when we
start adjusting the render options ourselves.
Key Elements in the Default Settings
There are three main elements specific to V-Ray that are creating some of the
aspects of the default render. These elements are Indirect Illumination, the
V-Ray Sun and Sky, and the V-Ray Physical Camera. These elements will be
explained very briefly here, and you can reference other chapters in the book
for a detailed explanation of these elements.
Indirect Illumination is simply light that does not come directly a light
source. In V-Ray this typically references two types of light; Global
Illumination and Bounced light. Global Illumination is simply a dome of light
that is emitted around the scene, and this can make setting up lighting very
quick and easy. Bounced light is simply the light energy that is bounced from a
surface. This bounced light is what allows V-Ray to create high quality
renderings.
The V-Ray Sun and Sky is physically accurate lighting model allowing for easy
recreation of the affects of the Sun and Sky. This is an excellent tool for
setting up exterior renderings with a sun. Due to the nature of the model in
which the sun and sky are based off of, you will find that under standard
conditions the sun and sky will be extremely bright. Because of this the V-Ray
Physical Camera is used to expose the scene and brings the rendered image to a
desirable level.
The V-Ray Physical Camera is modeled after a real-world camera and can be
used to expose a scene. In the real world, lighting is different in many
situations, and because of this a photographer will use the capabilities of the
camera to properly expose the image. Proper exposure means that the image is not
overly bright or too dark. When creating renderings this gives us the
opportunity to set our lighting as it would be in the real world (in this case
it is the Sun and Sky) and adjust our camera settings until we achieve the
desired result.
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