Checkerboard

A procedural checkerboard pattern rendered by @builtin::shaders.checkerboard, alternating a red base colour (1.0, 0.2, 0.2) with a blue emissive colour (0.2, 0.2, 1.0). Opaque and non-metallic (metallic 0.0) at mid roughness (0.5) — useful as a UV / scale test surface.

Inputs

• colors.base_color — the red square colour.
• colors.dark_color — the blue square colour.
• floats.roughness (0.5) — diffuse spread on the lit squares.
• floats.metallic (0.0) — dielectric surface.