Rim light

#version 300 es// Fresnel → Rim light, web GLSL (GLSL ES 3.00). From Creative Center, MIT license.precision highp float;uniform float u_time;uniform vec2 u_resolution; // this pass's output size in pixelsuniform float p_power; // Power: 3.0 (0.5 to 8.0)uniform vec3 p_color; // Color: vec3(0.35, 0.75, 1.0), sRGB; upload it decoded to linearuniform float p_intensity; // Intensity: 1.5 (0.0 to 4.0)in vec2 v_uv;in vec3 v_position;in vec3 v_normal;in vec3 v_view;out vec4 fragColor;struct Inputs {	vec2 uv;	vec3 position;	vec3 normal;	vec3 view;	float time;	vec2 fragCoord;	vec2 resolution;};vec3 u_toSrgb(vec3 c) {	return mix(c * 12.92, 1.055 * pow(c, vec3(1.0 / 2.4)) - 0.055, step(0.0031308, c));}// i.view points from the surface toward the camera, so dot(normal, view) is 1 where the surface faces the camera// and 0 at the silhouette. max() drops back faces, which would otherwise go above 1 after the inversion.vec4 effect(Inputs i) {	float facing = max(dot(i.normal, i.view), 0.0);	float edge = 1.0 - facing;	float rim = pow(edge, p_power);	vec3 glow = rim * p_color * p_intensity;	return vec4(glow, 1.0);}void main() {	Inputs i;	i.uv = v_uv;	i.position = v_position;	// Interpolation shortens the vectors between vertices	i.normal = normalize(v_normal);	i.view = normalize(v_view);	i.time = u_time;	i.fragCoord = gl_FragCoord.xy;	i.resolution = u_resolution;	vec4 frag_out = effect(i);	// The output is sRGB: clamped and encoded once, here, with no tone mapping; opaque, so alpha is 1	fragColor = vec4(u_toSrgb(clamp(frag_out.rgb, 0.0, 1.0)), 1.0);}

// Fresnel → Rim light, Godot 4. From Creative Center, MIT license.shader_type spatial;// Emission: a black base color, no specular or ambient light, and the effect as EMISSION, which glow catchesrender_mode specular_disabled, ambient_light_disabled;uniform float power : hint_range(0.5, 8.0, 0.1) = 3.0;uniform vec3 color : source_color = vec3(0.35, 0.75, 1.0);uniform float intensity : hint_range(0.0, 4.0, 0.05) = 1.5;struct Inputs {	vec2 uv;	vec3 position;	vec3 normal;	vec3 view;	float time;	vec2 fragCoord;	vec2 resolution;};// i.view points from the surface toward the camera, so dot(normal, view) is 1 where the surface faces the camera// and 0 at the silhouette. max() drops back faces, which would otherwise go above 1 after the inversion.vec4 effect(Inputs i) {	float facing = max(dot(i.normal, i.view), 0.0);	float edge = 1.0 - facing;	float rim = pow(edge, power);	vec3 glow = rim * color * intensity;	return vec4(glow, 1.0);}void fragment() {	Inputs i;	// Godot's UV starts at the top-left; the effect expects GLSL's bottom-left	i.uv = vec2(UV.x, 1.0 - UV.y);	// VERTEX, NORMAL and VIEW are in view space here; the effect works in world space	i.position = (INV_VIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;	i.normal = normalize((INV_VIEW_MATRIX * vec4(NORMAL, 0.0)).xyz);	i.view = normalize((INV_VIEW_MATRIX * vec4(VIEW, 0.0)).xyz);	i.time = TIME;	// FRAGCOORD's origin is the top-left too	i.resolution = VIEWPORT_SIZE;	i.fragCoord = vec2(FRAGCOORD.x, i.resolution.y - FRAGCOORD.y);	vec4 frag_out = effect(i);	ALBEDO = vec3(0.0);	EMISSION = frag_out.rgb;}