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Won't Fix
Votes
13
Found in
2021.3.47f1
2022.3.55f1
6000.0.32f1
6000.1.0a9
6000.2.0a1
Issue ID
UUM-91617
Regression
No
Graphics.RenderMeshIndirect does not issue multi-draw rendering commands when using a graphics API capable of multi-draw commands
How to reproduce:
1. Open the attached "IN-87308" project
2. Open the "SampleScene" and enter Play mode
3. Navigate to “Window > Analysis > Frame Debugger” and open the Frame Debugger window
4. Enable the Frame Debugger from the window
5. Navigate to “Camera.Render > Drawing > Render.OpaqueGeometry > RenderForwardOpaque.Render > RenderForward.RenderLoopJob” and expand it to reveal the “Draw Mesh” calls
6. Observe the amount of “Draw Mesh” calls inside the Frame Debugger
Expected result: Frame Debugger outputs one “Draw Mesh” call that combines all four of the vkCmdDrawIndexedIndirect calls
Actual result: Frame Debugger outputs four “Draw Mesh” calls
Reproducible in: 2021.3.47f1, 2022.3.55f1, 6000.0.32f1, 6000.1.0a9
Reproducible on: Windows 11
Not reproducible on: No other environments tested
Notes:
* Also reproducible in Player (while using a graphics debugger)
* Reproducible using both Vulkan and DirectX12
Comments (2)
-
MrDaveSh
Jan 30, 2025 15:14
i agree with previous comment, i did work for ages to implement RenderMeshIndirect, just to realize that it was not working as documented. This is really a huge missing features of the engines.
-
Manuel_H
Jan 28, 2025 11:05
This is not a satisfying resolution. MDI is a critical feature and there is no alternative for it. Can you please at least clarify if this is indeed a BUG or a missing feature? Because according to the docs of every unity release with the RenderMeshIndirect-API (https://docs.unity3d.com/6000.1/Documentation/ScriptReference/Graphics.RenderMeshIndirect.html) it should be implemented and working!
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