diff options
Diffstat (limited to 'drivers/gles3/shaders/scene.glsl')
| -rw-r--r-- | drivers/gles3/shaders/scene.glsl | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl index cd88ba6cb7..4081d73ab0 100644 --- a/drivers/gles3/shaders/scene.glsl +++ b/drivers/gles3/shaders/scene.glsl @@ -686,7 +686,10 @@ void light_compute(vec3 N, vec3 L, vec3 V, float A, vec3 light_color, float atte #endif // LIGHT_ANISOTROPY_USED // F float cLdotH5 = SchlickFresnel(cLdotH); - vec3 F = mix(vec3(cLdotH5), vec3(1.0), f0); + // Calculate Fresnel using cheap approximate specular occlusion term from Filament: + // https://google.github.io/filament/Filament.html#lighting/occlusion/specularocclusion + float f90 = clamp(50.0 * f0.g, 0.0, 1.0); + vec3 F = f0 + (f90 - f0) * cLdotH5; vec3 specular_brdf_NL = cNdotL * D * F * G; @@ -751,7 +754,7 @@ void light_process_omni(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 f if (omni_lights[idx].size > 0.0) { float t = omni_lights[idx].size / max(0.001, light_length); - size_A = max(0.0, 1.0 - 1 / sqrt(1 + t * t)); + size_A = max(0.0, 1.0 - 1.0 / sqrt(1.0 + t * t)); } light_compute(normal, normalize(light_rel_vec), eye_vec, size_A, color, omni_attenuation, f0, roughness, metallic, omni_lights[idx].specular_amount, albedo, alpha, @@ -800,7 +803,7 @@ void light_process_spot(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 f if (spot_lights[idx].size > 0.0) { float t = spot_lights[idx].size / max(0.001, light_length); - size_A = max(0.0, 1.0 - 1 / sqrt(1 + t * t)); + size_A = max(0.0, 1.0 - 1.0 / sqrt(1.0 + t * t)); } light_compute(normal, normalize(light_rel_vec), eye_vec, size_A, color, spot_attenuation, f0, roughness, metallic, spot_lights[idx].specular_amount, albedo, alpha, @@ -1107,7 +1110,7 @@ void main() { float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y; vec2 env = vec2(-1.04, 1.04) * a004 + r.zw; - specular_light *= env.x * f0 + env.y; + specular_light *= env.x * f0 + env.y * clamp(50.0 * f0.g, 0.0, 1.0); #endif } |