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Fix the output pass cache for multi-canvas rendering #33209

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Fix the output pass cache for multi-canvas rendering #33209

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8 changes: 8 additions & 0 deletions src/renderers/common/Renderer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -463,6 +463,14 @@ class Renderer {
*/
this._frameBufferTargets = new Map();

/**
* Intermediate color texture last used for the output pass.
*
* @private
* @type {?Texture}
*/
this._lastOutputFramebufferTexture = null;

const alphaClear = this.alpha === true ? 0 : 1;

/**
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3 changes: 3 additions & 0 deletions src/renderers/common/nodes/NodeManager.js
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Expand Up @@ -863,6 +863,8 @@ class NodeManager extends DataMap {
*/
hasOutputChange( outputTarget ) {

if ( this.renderer._lastOutputFramebufferTexture !== outputTarget ) return true;

const cacheKey = _outputNodeMap.get( outputTarget );

return cacheKey !== this.getOutputCacheKey();
Expand All @@ -886,6 +888,7 @@ class NodeManager extends DataMap {
texture( outputTarget, screenUV ).renderOutput( renderer.toneMapping, renderer.currentColorSpace );

_outputNodeMap.set( outputTarget, cacheKey );
renderer._lastOutputFramebufferTexture = outputTarget;

return output;

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