Interface PanelSpec

RGB tint applied to the panel. When PanelSpec.paint is also supplied, this multiplies the painter's colour texture. Default [1, 1, 1] (white — let the painter speak) when a painter is set; [0.96, 0.97, 0.99] otherwise.

Opacity in [0, 1]. Default 0.55.

Optional PBR painter — a zero-arg callback returning a MaterialMaps triple (colour + normal + metallic- roughness). When provided, the projector creates the three textures and a SceneMaterial inside the target SceneModel and binds the panel mesh to it.

The painter is called once per buildDrawing call. Cache the maps yourself if you're projecting onto multiple faces and want them to share one underlying texture set.

World-space texture repeat distance, in scene units per tile. Forwarded to the SceneMaterial as triplanarScale, so the panel quad (which has no UVs) samples the painter's textures via the renderer's triplanar fallback. Default 1.0.