Type Alias WriteImageOptions

RGBA background, each channel in [0, 1]. Default: (0, 0, 0, 1).

End camera position for motion blur. When set, enables camera motion blur: the renderer averages motionSamples sub-frames with the camera interpolated from (cameraPosition, lookAt, up) at shutter-open to (cameraEndPosition, lookAtEnd, upEnd) at shutter-close.

Camera position in world space. Default: (2, 1, -2).

Function returning a GraphicsDevice. Required — rasterization runs on GPU.

Gaussian splat data to render.

Output filename ending in .webp.

Camera-space Z of the focus plane in world units. Defaults to the distance from cameraPosition to lookAt along the forward axis (i.e. focus on the look-at point) when fStop is set. Has no effect without fStop. Pinhole only — passing this with projection: 'equirect' is an error.

Vertical field of view in degrees. Default: 60 for pinhole. Must be omitted for equirect (throws if supplied).

Aperture as a photographic f-stop (e.g. 2.8, 5.6, 11). Enables defocus blur / depth-of-field: smaller numbers = stronger blur. Defaults to disabled. Pinhole only — passing this with projection: 'equirect' is an error.

Output image height in pixels. Default: 720 (pinhole) or 1024 (equirect).

Point the camera looks at, in world space. Default: (0, 0, 0).

End look-at target for motion blur. Defaults to lookAt when motion blur is enabled.

Number of sub-frames to accumulate for motion blur. Cost is N× a single render. Default: 16. Only meaningful with cameraEndPosition.

Near clip distance in world units. Splats with camera-space depth <= near are culled. Default: 0.2 (matches the reference 3DGS rasterizer).

Camera projection mode. Default: 'pinhole'.

• 'pinhole' — perspective camera using fov.
• 'equirect' — full 360° × 180° equirectangular panorama from cameraPosition. Ignores fov. Requires width === 2 × height; default resolution is 2048 × 1024.

Vertical sensor height in world units, used to give fStop a defined physical meaning. Default 0.024 matches a 35mm full-frame sensor when world units are meters. Scale this with your scene's units (e.g. world unit = decimeter → 0.24, world unit = millimeter → 24). Has no effect without fStop.

Shutter fraction in [0, 1]. Portion of the start→end segment actually integrated, centered on the midpoint (standard shutter-angle convention: 1.0 = full motion, 0.5 = 180° shutter). Default: 1. Only meaningful with cameraEndPosition.

World-space up vector. Default: (0, 1, 0).

End up vector for motion blur. Defaults to up when motion blur is enabled.

Output image width in pixels. Default: 1280 (pinhole) or 2048 (equirect).