Lighting

Lighting Overview

Lighting in Omniverse KIT based apps offers a wide variety of lighting options and capabilities. Here is a quick look at how you can expect to interact with and manage lighting.

Basic Light Usage (Video)

Light Sources

Light sources in KIT based apps are made to realistically emulate real-world lights.

Light Types

Realworld Equivalent

Distant Light

Direct Sun/Moon light

Sphere Light

Light Bulb

Rect Light

Rectangular Panel Light

Disc Light

Circular Panel Lights and Spotlights

Cylinder Light

Neon/Fluorescent Light Tubes

Dome Light

HDRI Skysphere (Background) lighting

Distant Light

Distant lights are parallel rays of light useful for showering an entire scene in a directional light. Meant to emulate lights infinitely far away, shadows cast with type of light will be hard edged and rather harsh compared to other lights. Ideal for Sun/Moon light, distant lights are generally a critical element to any outdoor scene.

Distant Light

Sphere Light

Sphere lights emit light in all directions from a central ball (not a point). The softness of the shadows (and overall intensity) are dictated by the radius of the central ball. Sphere lights are effective replacements for light bulbs.

Cylinder Light

Light Specific Properties

Usage

Radius

Source Sphere Radius

Treat as Point

Makes the sphere size infinitely small (not supported yet)

Rectangular (Rect) Light

Rectangular lights are capable of emulating light generated from a panel. The rectangle can be adjusted in width and length to accommodate any ratio from thin rectangle to square shape. This affect overall light power and shadow softness.

Rectangular Light

Light Specific Properties

Usage

Height

Depth of the light source (x value)

Length

Length of the source (y value)

Disc Light

Similar to the rect light the Disc light emulates panel lighting but in the shape of a circle. Size is controlled by radius which affects overall light power as well as shadow softness. If shaping is used, the light acts as a traditional spotlight and has specialized controls to adjust the shape and color of the lights falloff.

Disc Light

Light Specific Properties

Usage

Radius

Source Disc Radius

Cone Angle

Controls Projection Angle of the light. Higher is wider, lower is narrower.

Cone softness

Increased the value to “soften” the lights cone edges.

Focus

Higher Values soften and blends with Focus Tint

Focus Tint

Tints the edges of the light falloff based on Focus

Note

Increasing Shadow samples per pixels in Rendering Settings smooths light falloff at the cost of render speed.

Cylinder Light

Tubular lighting useful in emulating neon/fluorescent light tubes and other linear omnidirectional lighting.

Cylinder Light

Light Specific Properties

Usage

Radius

Source Tube Radius

Length

Source Tube Length

Dome Light

Used for image-based (background) lighting when supplied with a texture. Dome lights allow you to easily light your entire scene with a high or low dynamic range image.

Dome Light

Light Specific Properties

Usage

Texture:File

Low/High Dynamic Range image input

Texture:Format

Selects Skydome Format
Choices include: LatLong, Angular, Mirrored Ball and Verical Cross
HDR Formats: HDR, Exporter
LDR Formats: PNG

Common Light Properties

Common Light Properties

Usage

Color

The color of the light

Color Temperature

The color of the light using the Kelvin Scale. (Not Supported Yet)

Diffuse Multiplier

Adjusts the Diffuse Power of the light.

Enable Color Temp

True uses Color Temperature for input, False uses Color. (Not Supported Yet)

Exposure

Exposure offers a quick way to increase/decrease light intensity in stops.

Intensity

Base luminosity of the the light source.

Normalize Power

Brings light power into a normalized range.

Specular Multiplier

Adjusts the amount specularity the light contributes to.