+Synopsis+

Adding URP 15.0.4 to a project that uses Mars causes Console errors regarding obsolete APIs.  Without URP, these errors do not occur. 

I flagged this as a regression, though strictly speaking other parts of Unity software have moved on, leaving Mars using an obsolete API.  

+Configuration+

Unity 2023.1.0b7

Mars 1.5.0 or 1.5.1

URP 15.0.4

Mac M1 or Intel

+How to See the Bug+

Open the attached project using Unity 2023.1.0b7. 

Choose Ignore when asked about Safe Mode. 

In Console you will see the errors listed below. 

(There will be additional errors, but click Clear to hide them.) 

Alternatively, see steps below if you wish to set up this repro project from scratch. 

Note that creating an URP Asset, enabling it in Graphics Settings, and converting all materials to URP does not alleviate the errors listed below.

+Console Errors+

Library/PackageCache/com.unity.mars@1.5.0/Editor/Scripts/Simulation/MarsParticleMaterialInspector.cs(61,21): error CS0619: 'BaseShaderGUI.MaterialChanged(Material)' is obsolete: 'MaterialChanged has been renamed ValidateMaterial'

Library/PackageCache/com.unity.mars@1.5.0/Editor/Scripts/Simulation/MarsParticleMaterialInspector.cs(93,13): error CS0619: 'BaseShaderGUI.MaterialChanged(Material)' is obsolete: 'MaterialChanged has been renamed ValidateMaterial'

Library/PackageCache/com.unity.mars@1.5.0/Editor/Scripts/Simulation/MarsMaterialInspector.cs(105,25): error CS0619: 'BaseShaderGUI.MaterialChanged(Material)' is obsolete: 'MaterialChanged has been renamed ValidateMaterial'

Library/PackageCache/com.unity.mars@1.5.0/Editor/Scripts/Simulation/MarsMaterialInspector.cs(168,13): error CS0619: 'BaseShaderGUI.MaterialChanged(Material)' is obsolete: 'MaterialChanged has been renamed ValidateMaterial'

+How to Create the Repro Project+

Unity Hub > New Project > Unity 2023.1.0b7 > 3D Core

Edit > Import Package > Custom Package > MARS_Installer.unitypackage 

Package Manager > URP 15.0.4 > Install

The following Console errors occur.  Upgrading to Mars 1.5.1 via package manifest edits yields the same errors. 

Converting materials to URP per steps below does not alleviate errors.