#Texture Flickering on Character and Certain Objects, Unreal Rendering Bug Known Issue Please escalat

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polar agate
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This is a known issue I've raised with NVIDIA reps over a 5070-TIs and they referred me to Epic, but Epic has been thus far nonrespondent. This isn't exclusive to Windrose, however, upon booting up this game I'm noticing it as well.

There are two issues: Texture Flickering and a bug with Lumen+Global Illumination.

  1. Texture Flickering occurs on certain models under unknown conditions. When GPU load exceeds 100% this will result in a memory allocation error and a crash. From what I can tell this is exclusive to 5070-TIs and is also exclusive to the Unreal Engine.

  2. Lumen+Global Illumination cause an odd interaction where theres green-red-yellow strobing lights from light sources. I had to set Windrose settings to low.

I've attached a PII redacted version of a conversation with an NVIDIA rep I had regarding this which will include the debugging process we went through. The only way we can proceed on this is by getting a response from Epic, because as it stands until we either get a critical mass of 5070-TI users clamerring for a fix or Epic making an official response nothing is going to happen.

You'll note this conversation includes two games that we tested on: Incursion Red River and Eversiege: Untold Ages.

While I have not induced a crash on Windrose, if I manage to incur one I will post one here but I have a fairly beefy rig so pushing my GPU load past 100% when I have a well optimized system is tricky.

📎 NVIDIA_REP.docx
polar agate
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UPDATE: This is specific to Blackwell architecture 50-series cards, NOT just 5070-TIs, which is why some 50-series users will experience this and others will not.
Issue occurs exclusively in UE5 titles across multiple games, with consistent texture flickering and Lumen-related lighting instability. System passes all non-UE5 stress tests (including path-traced workloads) with no artifacts. GPU telemetry (temperature, power, clocks) is stable. Crashes occur as EXCEPTION_ACCESS_VIOLATION under high GPU utilization. Behavior is reproducible across multiple driver versions and unaffected by DLSS, frame generation, or resolution scaling. This strongly suggests a UE5 rendering pipeline or driver interaction issue specific to RTX 50-series (Blackwell), likely related to memory residency or temporal buffer handling under DX12.