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Examples: Improved WebGPU SSR example. #31539

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Merged
mrdoob merged 4 commits into from
Jul 31, 2025
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Examples: Improved WebGPU SSR example. #31539

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90989d4
Examples: Improved WebGPU SSR example.
mrdoob Jul 31, 2025
0c94714
Pack metalness and roughness.
mrdoob Jul 31, 2025
b30b8a9
Updated screenshot.
mrdoob Jul 31, 2025
98d802c
Rename function.
mrdoob Jul 31, 2025
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30 changes: 21 additions & 9 deletions examples/webgpu_postprocessing_ssr.html
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@
<script type="module">

import * as THREE from 'three/webgpu';
import { pass, mrt, output, normalView, metalness, blendColor, screenUV, color, sample, directionToColor, colorToDirection } from 'three/tsl';
import { pass, mrt, output, normalView, metalness, roughness, blendColor, screenUV, color, sample, directionToColor, colorToDirection, vec2 } from 'three/tsl';
import { ssr } from 'three/addons/tsl/display/SSRNode.js';
import { smaa } from 'three/addons/tsl/display/SMAANode.js';

Expand Down Expand Up @@ -75,6 +75,12 @@

if ( object.material ) {

if ( object.material.name === 'Lense_Casing' ) {
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@Mugen87 Mugen87 Aug 3, 2025 •
edited
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Maybe reverting this addition due to #31539 (comment)?

Yes, the previous look was also not physically correct but the missing objects when looking through the lens makes the scene look broken^^.


object.material.transparent = true;

}

// Avoid overdrawing
object.material.side = THREE.FrontSide;

Expand Down Expand Up @@ -113,36 +119,42 @@
scenePass.setMRT( mrt( {
output: output,
normal: directionToColor( normalView ),
metalness: metalness
metalrough: vec2( metalness, roughness )
} ) );

const scenePassColor = scenePass.getTextureNode( 'output' );
const scenePassNormal = scenePass.getTextureNode( 'normal' );
const scenePassDepth = scenePass.getTextureNode( 'depth' );
const scenePassMetalness = scenePass.getTextureNode( 'metalness' );
const scenePassMetalRough = scenePass.getTextureNode( 'metalrough' );

// optimization bandwidth packing the normals and reducing the texture precision if possible

const metalnessTexture = scenePass.getTexture( 'metalness' );
metalnessTexture.type = THREE.UnsignedByteType;

const normalTexture = scenePass.getTexture( 'normal' );
normalTexture.type = THREE.UnsignedByteType;

const metalRoughTexture = scenePass.getTexture( 'metalrough' );
metalRoughTexture.type = THREE.UnsignedByteType;

const customNormal = sample( ( uv ) => {

return colorToDirection( scenePassNormal.sample( uv ) );

} );

const customMetalness = sample( ( uv ) => {

return scenePassMetalRough.sample( uv ).r;

} );

//

ssrPass = ssr( scenePassColor, scenePassDepth, customNormal, scenePassMetalness, camera );
ssrPass = ssr( scenePassColor, scenePassDepth, customNormal, customMetalness, camera );
ssrPass.resolutionScale = 1.0;

// blend SSR over beauty
const outputNode = smaa( blendColor( scenePassColor, ssrPass ) );

const outputNode = smaa( blendColor( scenePassColor, ssrPass.mul( scenePassMetalRough.g.oneMinus() ) ) );

postProcessing.outputNode = outputNode;

Expand Down