Search Issue Tracker

Fixed in 2022.1.X

Fixed in 2020.3.X, 2021.2.X



Found in

Issue ID




[HDRP][Vulkan] "Lag" when using Vulkan API in build, even with good framerate



When running a player build with the Vulkan API, the rendering is lagging compared to DX11 or DX12, even if it has a similar framerate.

Steps to reproduce:
- Download and unzip this player build :
- Run the build from command line with "--force-vulkan" option
- Move around
- Switch to full screen (alt+enter)
- Move around

Result: "Lag" in both modes, more noticeable when in fullscreen even if it is still rendering at 1080p.

Expect: No lag, never.

Reproduces on : Unity 2021.2.0a14 HDRP 12 : This is the version used to build this player, but the issue is here since ages.

- You can compare with the other supported APIs on windows with "--force-d3d11" and "--force-d3d12".
- You can make this build yourself following these steps :
- Create a new project from HD template
- Import "Graphy" from asset store :
- Add the [Graphy] prefab from \Assets\Graphy - Ultimate Stats Monitor\Prefab to the template scene
- Add Vulkan and DX12 to the Windows API list in Project Settings / Player
- Set Fullscreen Mode to Windowed and Resolution to 1920x1080 in Project Settings / Player
- Set VSync Count to "Don't Sync" in Project Settings / Quality (depend on the default quality level)

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.