|A scene's mood, visibility, and shadows are affected by the lighting. Lights can be added and their intensity can be changed.|
Introduction to Lights in V-Ray
Lighting plays the most important role in rendering because it affects the color, shadow, reflection, and refraction among objects and materials in the scene. V-Ray comes equipped with Global Illumination , which is the natural lighting in a scene. It can be difficult to produce a specific lighting effect because of the many ways to create lights, as well as to change a light's appearance in a final render.
Be sure to choose a light that's best for the type of lighting needed for the scene. Lights can be created using Rhino commands. Or, use the sun and sky tool that is built into V-Ray to position a directional light.
There are two main ways to change lighting options. The first way uses the Properties panel in Rhino to change the properties of a selected light. This is helpful for controlling specific light objects. The second way uses Light Options in V-Ray, which controls the ambient light in the scene--that is, the lighting for the entire scene, not just one specific light.
Light Options in V-Ray Options
Settings for all lights are controlled in V-Ray Options.
- Make sure this box is checked. If it is unchecked, any lights in the model will not be rendered.
- Hidden Lights
- When modeling in Rhino, lights can be hidden from the scene so that it is easier to model. Even though the lights are hidden, V-Ray will still render them if the box next to Hidden Lights is checked. To prevent hidden lights from affecting the render, uncheck this box.
- Default Lights
- Checking this box turns on the lights that are built into V-Ray. If this box is unchecked, be sure that GI (Skylight) under Environment is checked--otherwise, the render will turn out completely black.
- For a more realistic render, make sure this box is checked so that shadows of objects will be rendered.
- GI (Skylight)
- This controls the Global Illumination . A V-Ray Sky can be added for illumination.
- This controls the color of the background in the render. It can be changed to an image by clicking on the m next to the color selection.
Lights for Exterior Renderings
Typically, exterior renderings can quickly be made by using the default GI. However, to light a scene specific to a time and day, the sun and sky can be set.