Struct ComposedFrameParams 

#[non_exhaustive]
pub struct ComposedFrameParams<'a> {
    pub camera: &'a Camera,
    pub settings: &'a OpticastSettings,
    pub fog: CpuFog,
    pub sky_color: u32,
    pub sky: Option<&'a Sky>,
    pub materials: Option<&'a MaterialTable>,
    pub terrain_materials: &'a [(Rgb, u8)],
    pub lights: CpuLights<'a>,
    pub sprite_occluder: Option<&'a dyn WorldOccluder>,
    pub view_cutout: Option<&'a SceneViewCutout>,
    pub fow: Option<(GridId, &'a FogOfWar)>,
}

The composed render’s bundled per-frame inputs: the positional wrapper ladder (render_scene_composed → _with_materials → _with_materials_scratch) had reached 17 arguments with adjacent same-typed Options a compiler can’t tell apart — a swapped slot would compile fine. #[non_exhaustive]: construct with ComposedFrameParams::new and override fields, so future frame inputs (OC.4 ghost mode, …) are field additions, not new wrappers.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

camera: &'a Camera

World camera.

settings: &'a OpticastSettings

Projection + scan settings.

fog: CpuFog

Fog + per-face side shades.

sky_color: u32

Solid sky colour for the per-grid temp pre-fill.

sky: Option<&'a Sky>

Optional textured sky panorama.

materials: Option<&'a MaterialTable>

TV — global voxel-material palette.

terrain_materials: &'a [(Rgb, u8)]

TV.4 — terrain colour→material map.

lights: CpuLights<'a>

CPU.1 — world-space dynamic lights (transformed per grid).

sprite_occluder: Option<&'a dyn WorldOccluder>

XS.2 — sprite-volume occluder (sprites cast onto terrain).

view_cutout: Option<&'a SceneViewCutout>

OC — the frame’s view cutout (keyhole).

fow: Option<(GridId, &'a FogOfWar)>

FW.2 — fog-of-war styling for ONE grid (the twin): its GridId plus the mask/config to style it with. Only that grid gets the per-hit dim / desaturate / hide; every other grid renders normally. None (the default) = no fog styling, byte-identical.

Implementations

impl<'a> ComposedFrameParams<'a>

pub fn new(camera: &'a Camera, settings: &'a OpticastSettings) -> Self

Params with every optional input off — override what differs.