# TinyUSDZ UsdLux Light Demo

## Drop USD File Here

Supports .usd, .usda, .usdc, .usdz

### UsdLux Light Demo

Visualize USD lights in Three.js.
Drag & drop or use the button to load USD files.

Embedded Scenes:

Current: Embedded Scene Loading...

#### Lights (0)

No lights loaded

#### Selection Mode

#### Light Properties

No light selected
Color: #ffffff
Intensity:
Exposure:
Position:
X
Y
Z
Rotation:
X
Y
Z
Cone Shaping
Cone Angle:
Softness:

#### Environment Map (DomeLight)

Color:
Texture: None

#### Scene Objects

All Meshes Ground Grid Sphere Torus Box Light Helpers

#### Display Settings

Tone Map:
Film-like response with highlight roll-off
Exposure: 0.0 EV
Gamma: 2.2

#### Lighting Mode

Direct lighting from scene lights
Show as Background

#### HDRI Projection

Project scene lights to an environment map (no TinyUSDZ required)

Resolution:
Max Dist: 100
Position:
X
Y
Z
3D Locator:
No HDRI generated yet

#### Spectral Settings

Color Mode:
Wavelength: 550nm
Blackbody: 5500K
Select a light to view spectral data
Lights: 0 Meshes: 1 FPS: 60
Controls:
Left-click + drag: Rotate
Right-click + drag: Pan
Scroll: Zoom
Transform: W/E/R/T

#### HDRI Preview

- -
Normalize
Move mouse over image
Live Update