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Wrap lighting with subsurface tint and back light

In your harnessGodot shaderMIT

Soft skin and wax look with a custom light function: wrapped diffuse that lets light bleed past the terminator in a warm scatter colour, translucency where light comes from behind, and a soft specular.

Render of Wrap lighting with subsurface tint and back light
The render its check recorded in Godot 4.7.2, 256 by 256 pixels.

What it takes and gives

Shader type
spatial
Parameters
albedo (vec4 = 0.88, 0.68, 0.58, 1), scatter_color (vec4 = 0.85, 0.2, 0.12, 1), wrap (float = 0.45), scatter_width (float = 0.35), translucency (float = 0.6), translucency_power (float = 4), translucency_distortion (float = 0.25), specular_strength (float = 0.25) and 1 more
Result
Peach-coloured shapes lit from behind and the side with a warm red glow along the shadow edge and through the thin capsule.
Renderers
compatibility: compiled and rendered, forward plus: not verified, mobile: not verified
Placement
res://baltor/godot_shaders/wrap_subsurface_skin/

Limits. An approximation without real thickness: translucency is the same on thick and thin parts unless you scale it per object. Wrap lighting brightens shadowed regions, so cast shadows look softer than the light. Not energy conserving.

Details

Kind
Godot shader
Engine
Godot 4.3 or later
Files
11 files, 56.1 KB
Licence
MIT
Declared effects
reads files, runs commands
Checked with
Godot 4.7.2, opengl3 compatibility (Mesa llvmpipe, Xvfb)
Checks
contract static, engine run, engine log clean, shader in scene, capture written, render not uniform, shader changes pixels
Techniques
Wrap lighting ((N.L + w) / (1 + w)), Terminator scatter band tint, View and light direction translucency with normal distortion, Blinn-Phong specular
Tags
godot shader, spatial, subsurface, skin, wrap lighting, translucency, custom light function
Identity
library.supply.creative_originals.32e7268972f819ecef71ac85.478eee671cf75919
Version
478eee671cf75919a686b40631d658ddfe1ae63d5d0f8fdce074f41981772e76

The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.

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