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Votes

0

Found in [Package]

13.1.3

Issue ID

1387668

Regression

No

A Spawn Node's Block properties affect another Spawn Node's visible particles

Package: Visual Effect Graph

-

Reproduction steps:
1. Open the user's attached "Testbed.zip" project
2. Open the "Scene" Scene
3. In the Assets open the "New VFX" Visual Effect Graph
4. Change the Count property of the "Spawn system (1)" to 10
5. Change the Count property of the "Spawn system" to 5
6. Observe the Scene

Expected result: Both Spawn Nodes spawn visible particles based on the Count property of each Spawn Node's Block
Actual result: Both Spawn Nodes spawn visible particles based on the Count property of the "Spawn system" Block

Reproducible with: 10.8.0 (2020.3.25f1), 12.1.2 (2021.2.7f1), 13.1.3 (2022.1.0b2)
Could not test with: 7.7.1 (2019.4.34f1) (Missing required context for Visual Effect Graph)

Notes:
- The "Spawn system (1)" spawns particles based on its Block's Count property, but only the amount of particles in the Count property of the "Spawn system" Block is visible.
- After reproducing the issue, you can select "New VFX" GameObject in the Hierarchy window and see that some particles are invisible.

  1. Resolution Note:

    For this specific issue, the problem was actually in user code, we were trying to render the second VFXSystem with the rendering draw call of the first one.

    In VFXPass.cs (1387668_Testbed\Assets\Scripts\VFXPass.cs), replace
    ctx.cmd.DrawRenderer(VFXPass.Renderers[i], materials[j]);
    By
    ctx.cmd.DrawRenderer(VFXPass.Renderers[i], materials[j], j);

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