Post-process flickering refers to unwanted fluctuations in visual effects applied during the post-processing stage of image or video rendering. This issue can manifest as inconsistent lighting, color shifts, or other visual artifacts, often resulting from improper settings or limitations within the rendering engine. For instance, in Unity’s Universal Render Pipeline (URP), the bloom effect may flicker due to its default half-resolution setting; adjusting it to full resolution can mitigate this problem.
Similarly, in Unreal Engine 5, flickering shadows have been observed when using global illumination settings, particularly with small objects like grass; switching the Skylight actor mode to Stationary has been suggested as a potential solution.
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Addressing post-process flickering typically involves fine-tuning rendering parameters, updating software, or modifying specific effect settings to achieve stable and consistent visuals.