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Properly scale SSR reflection based on metallic value for dielectric materials

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This commit is contained in:
clayjohn 2022-09-09 15:52:07 -07:00
parent 24ce46e2a1
commit 65f0113bc6
6 changed files with 16 additions and 26 deletions
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21
servers/rendering/renderer_rd/shaders/effects/screen_space_reflection.glsl
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@ -30,12 +30,7 @@ layout(push_constant, std430) uniform Params {
bool orthogonal;
float filter_mipmap_levels;
bool use_half_res;
uint metallic_mask;
uint view_index;
uint pad1;
uint pad2;
uint pad3;
}
params;
@ -167,7 +162,7 @@ void main() {
if (depth > z_to) {
// if depth was surpassed
if (depth <= max(z_to, z_from) + params.depth_tolerance && -depth < params.camera_z_far) {
if (depth <= max(z_to, z_from) + params.depth_tolerance && -depth < params.camera_z_far * 0.95) {
// check the depth tolerance and far clip
// check that normal is valid
found = true;
@ -231,18 +226,20 @@ void main() {
}
}
// Isn't this going to be overwritten after our endif?
final_color = imageLoad(source_diffuse, ivec2((final_pos - 0.5) * pixel_size));
imageStore(blur_radius_image, ssC, vec4(blur_radius / 255.0)); //stored in r8
#endif // MODE_ROUGH
final_color = vec4(imageLoad(source_diffuse, ivec2(final_pos - 0.5)).rgb, fade * margin_blend);
//change blend by metallic
vec4 metallic_mask = unpackUnorm4x8(params.metallic_mask);
final_color.a *= dot(metallic_mask, texelFetch(source_metallic, ssC << 1, 0));
// Schlick term.
float metallic = texelFetch(source_metallic, ssC << 1, 0).w;
float f0 = mix(0.04, 1.0, metallic); // Assume a "specular" amount of 0.5
normal.y = -normal.y;
float m = clamp(1.0 - dot(normalize(normal), -view_dir), 0.0, 1.0);
float m2 = m * m;
m = m2 * m2 * m; // pow(m,5)
final_color.a *= f0 + (1.0 - f0) * m; // Fresnel Schlick term.
imageStore(ssr_image, ssC, final_color);