Unreal Engine Issues

UE-87115

SSGI doesn't function properly using Vulkan

SSGI doesn't function properly using Vulkan

Description

Screen Space Global Illumination appears really dark when using the Vulkan RHI on Windows and Linux. This behavior is also present in a Shipping build.

This was reported and tested on 4.24.1 (CL-10757647) and reproduced in Main 4.25 (CL-11062379). The results in Main are much clearer than in 4.24

Steps to Reproduce
  1. Open the UE4 Editor on Linux or Windows (-vulkan) and create a Third Person project
  2. Run the r.SSGI.Enable 1 command in PIE or in a Packaged Shipping build

Results: Screen goes dark and fuzzy (see attached)

Expected: Smooth SSGI

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Cannot Reproduce
ComponentUE - Rendering Architecture - RHI
Affects Versions4.24.1, 4.25
Target Fix5.0
CreatedJan 20, 2020
ResolvedJan 20, 2022
UpdatedJan 21, 2022
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