Struct SystemTextures 

pub struct SystemTextures {
    pub white_2d: Tracked<TextureView>,
    pub black_2d: Tracked<TextureView>,
    pub transparent_2d: Tracked<TextureView>,
    pub normal_2d: Tracked<TextureView>,
    pub black_cube: Tracked<TextureView>,
    pub white_r8: Tracked<TextureView>,
    pub black_hdr: Tracked<TextureView>,
    pub depth_d2array: Tracked<TextureView>,
    pub screen_layout: Tracked<BindGroupLayout>,
    pub screen_sampler: Tracked<Sampler>,
    pub shadow_compare_sampler: Tracked<Sampler>,
}

Global system fallback texture pool and Group 3 bind-group infrastructure.

Created once during renderer initialisation and shared (by reference) with all render-graph contexts. All textures are 1×1 (or 1×1×6 for cubes) and never mutated after creation.

Fields

white_2d: Tracked<TextureView>

1×1 RGBA8 [255,255,255,255] — multiplicative identity.

black_2d: Tracked<TextureView>

1×1 RGBA8 [0,0,0,255] — additive identity.

transparent_2d: Tracked<TextureView>

1×1 RGBA8 [0,0,0,0] — fully transparent / no contribution.

normal_2d: Tracked<TextureView>

1×1 RGBA8 [128,128,255,255] — default tangent-space normal (+Z).

black_cube: Tracked<TextureView>

1×1×6 RGBA8 all-black cube map — empty environment / IBL.

white_r8: Tracked<TextureView>

1×1 R8Unorm [255] — SSAO fallback (AO = 1.0, fully lit).

black_hdr: Tracked<TextureView>

1×1 Rgba16Float zero — HDR transmission fallback.

depth_d2array: Tracked<TextureView>

1×1 Depth32Float D2Array — shadow map fallback.

screen_layout: Tracked<BindGroupLayout>

BindGroupLayout for Group 3 (transmission, SSAO, shadow).

screen_sampler: Tracked<Sampler>

Linear-clamp sampler shared by transmission / SSAO sampling.

shadow_compare_sampler: Tracked<Sampler>

LessEqual comparison sampler for PCF shadow sampling.

Implementations

impl SystemTextures

pub fn new(device: &Device, queue: &Queue) -> Self

Creates all system textures and Group 3 infrastructure.

This is called once during renderer initialisation. The total GPU memory footprint is negligible (a handful of 1×1 textures).