WebGLRenderer: Fix feedback loop regression. (#33063)

src/renderers/WebGLRenderer.js

@@ -1953,7 +1953,7 @@ class WebGLRenderer {
 					generateMipmaps: true,
 					type: hasHalfFloatSupport ? HalfFloatType : UnsignedByteType,
 					minFilter: LinearMipmapLinearFilter,
-					samples: capabilities.samples,
+					samples: Math.max( 4, capabilities.samples ), // to avoid feedback loops, the transmission render target requires a resolve, see #26177
 					stencilBuffer: stencil,
 					resolveDepthBuffer: false,
 					resolveStencilBuffer: false,