Unity Issue Tracker - "Trying to load color backbuffer into a complex RenderPass setup, results undefined" error is thrown when using Decal Projector

Fixed

6.2.X

6.1.X

6.0.X

6000.0.23f1 onwards

Unity graphics engine was using a wrong check to determine whether an attachment is a back buffer or not when using Render Passes. It has been fixed and URP (using Render Graph and Render Passes in Unity 6) doesn't throw this error anymore. Thanks for reporting this issue.

Reproduction steps:
1. Open the attached “IN-92425_urp_opengl” project
2. Open the “Assets/Samples/Universal RP/17.0.3/URP Package Samples/Decals/BlobShadow/BlobShadow.unity” scene
3. Observe the Console window

Actual results: "Trying to load color backbuffer into a complex RenderPass setup, results undefined" is thrown
Expected results: No error is thrown

Reproduced with: 6000.0.23f1, 6000.0.34f1, 6000.1.0b1
Not reproduced with: 6000.0.22f1
Couldn’t test with: 2021.3.47f1, 2022.3.55f1 (Project requires features available in Unity 6)

Reproduced on: Ubuntu 24.04, Windows 11 Pro
Not reproduced on: no other environment tested

Note: Does not reproduce on Vulkan, DX11

"Trying to load color backbuffer into a complex RenderPass setup, results undefined" error is thrown when using Decal Projector

Unity: SRP Foundation

Fixed

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"Trying to load color backbuffer into a complex RenderPass setup, results undefined" error is thrown when using Decal Projector

Unity: SRP Foundation

Statuses

Fixed

Resolution Notes

6.2.XFixedUnity graphics engine was using a wrong check to determine whether an attachment is a back buffer or not when using Render Passes. It has been fixed and URP (using Render Graph and Render Passes in Unity 6) doesn't throw this error anymore. Thanks for reporting this issue.

6.0.XFixedUnity graphics engine was using a wrong check to determine whether an attachment is a back buffer or not when using Render Passes. It has been fixed and URP (using Render Graph and Render Passes in Unity 6) doesn't throw this error anymore. Thanks for reporting this issue.

Description

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