3D Camera

When a pass uses 3D geometry (plane, cube, sphere, or GLB model), a free-fly camera replaces the fixed 2D view. You can orbit and move the camera to inspect your shader from any angle.

The camera activates automatically when a pass with 3D geometry is visible.

Controls

Action	Input
Orbit	Left mouse button drag
Move forward / back	W / S
Strafe left / right	A / D
Up / down	Q / E
Sprint	Hold Shift while moving
Keyboard look	Arrow keys

Orbit uses yaw (around world Y axis) and pitch (clamped to ±90° to avoid flipping). Movement is relative to the camera's current orientation — pressing W moves toward wherever you're looking.

Camera Uniforms

iCameraPos and iCameraDir are available in every shader, including 2D fullscreen passes:

Uniform	Type (GLSL)	Type (Slang)	Description
iCameraPos	vec3	float3	Camera position in world space
iCameraDir	vec3	float3	Camera forward direction (normalised)

In 2D fullscreen mode the camera defaults to (0, 0, 0) looking along (0, 0, 1) — still useful as a fixed ray origin and direction for raymarching. When a pass uses 3D geometry, the camera transforms update with your mouse and keyboard input.

Next

Vertex Shaders — deform 3D geometry before it reaches the fragment shader