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Fixed in 2021.1.X

Votes

0

Found in

2018.4

2019.4.0f1

2020.2

Issue ID

1256373

Regression

No

[Terrain] High CPU usage from Terrain.UpdateMaterials method when Editor is rendering terrain

Terrain

-

How to reproduce:
1. Open attached project "case1256373.zip" and scene Assets -> Scenes -> Bugs -> "TerrainBugReproScene"
2. Enter Play Mode
3. Observe CPU Usage in the Profiler window

Expected result: Rendering terrains should not take 1/3 to 1/2th of the frame's CPU budget
Actual result: Rendering terrains take 1/3 to 1/2th of the frame's CPU budget

Reproducible with: 2018.4.26f1, 2019.4.9f1, 2020.1.2f1, 2020.2.0a21

Note: This issue is also being discussed in this forum thread: https://forum.unity.com/threads/terrain-updatematerials-very-expensive.622768/

  1. Response avatar

    Resolution Note (fix version 2021.1):

    Fixed in 2021.1.0a1

Comments (2)

  1. 9ca10d1ead34f4853c9149d9a7ddf876?d=mm

    Tomcat9

    Jun 20, 2021 11:04

    Still no fix for 2020. So now I have the choice of using a 2020 version with this huge performance hit bug, or 2021 which is entirely a buggy mess itself. Terrible.

  2. D700ec85f02cc1b5e5729cb358641fa4?d=mm

    i2eilly

    Dec 16, 2020 23:58

    Is there any chance this can be back ported to 2019.4 LTS, I am currently near the end of my project and this issue is still present in the LTS versions of Unity.

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