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"Property (_BaseColor) already exists. Use SetTexture instead." thrown with URP SimpleLit material and .mainTexture is called

Graphics - General


How to reproduce:
1. Open attached project "" and scene "SampleScene"
2. In Project window, Reimport 'SetTexture' script
3. In Hierarchy window, select 'GameObject' object
4. In Inspector window, right-click on 'SetTexture' script component -> "Set"
5. Observe Console window

Expected result: texture is assigned to the object material, no warnings are thrown
Actual result: warning in console "Property _BaseColor already exists"

Reproducible with: 2019.3.8f1, 2019.4.1f1 (URP 7.3.1), 2020.1.0b12, 2020.2.0a14
Not reproducible with: 2018.4.23f1 (LWRP 4.10.1) 2019.3.0a1, 2019.3.7f1 (URP 7.3.1)
Could not test with:

- No repro on MacOS
- No repro with Universal Render Pipeline/Lit shader
- "Set" error only prints to console once per session (reimport 'SetTexture' script)
- Used DX11 when checking
- a similar error prints every time "Set" is clicked if we add Debug.Log(renderer.sharedMaterial.mainTexture);

  1. Resolution Note:

    A quick manual workaround might be to swap [MainTexture] & [MainColor] in Unlit shader.

    Fixed in URP 9, 8 and 7

Comments (2)

  1. erinhalsey

    Dec 08, 2021 09:55

    The freeze is third party plugin issue. If I delete two "Editor" folders related to Google Play, the build no longer freezes (it does fail, but goes further than Menu scene). Those third party plugins to contains build pre-process code that's freezing. That code needs to be analized/fixed.

  2. Deutschland1000

    Aug 02, 2020 15:42

    I had the same issue and found out that the problem is that the URP SimpleLit material does not have a "_MainTex" property, so renderer.sharedMaterial.mainTexture is not working. The solution is to use renderer.sharedMaterial.SetTexture("_BaseMap", yourTexture) or renderer.sharedMaterial.GetTexture("_BaseMap") instead.

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