Synopsis

I made a new project which includes: 

- Basic Simulation Environments Pack

- MARS Nav Mesh

- Unity MARS Basic Templates

- Unity MARS Platformer Template 

- Unity MARS Training Template 

- Unity MARS Tutorials

Then I created an URP Render Pipeline asset which I assigned in Graphics settings, and ran the URP material converter. This resulted in the 57 Console Messages below.  Filtering for all materials in the project reveals 3 hot pink (i.e. broken) materials listed below, which utilize Hidden/InternalErrorShader.  

See also MARS-1454. 

How to See the Bug

Open the repro project per link in Comments.  

Use Package Manager to install URP. 

Create an URP RP asset. 

Assign your URP RP asset in Graphics settings. 

Edit > Render Pipeline > Universal Render Pipeline > Upgrade Project Materials to URP Materials

Note Console messaged. 

Use Project view to filter all materials in the project; some are hot pink indicating breakage. 

Configuration

Unity 2020.3.39f1

ARF 4.1.12 

MARS 1.5.0-preview.1 

URP 10.10.0

Mac Mini M1 

Broken Materials

Inter-Regular SDF Material; Hidden/InternalErrorShader

Inter-Regular SDF Overlay Material; Hidden/InternalErrorShader

Liberation Sans SDF - Overlay Material; Hidden/InternalErrorShader

Console Messages

SimEnvironment_Accent material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

DebugPlaneGeometry material was not upgraded. There's no upgrader to convert MARS/PlaneWithEdgeTransparent shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

CameraPreview material was not upgraded. There's no upgrader to convert Unlit/CameraPreview shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Wall material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

EntityVisualBodySkinMaterial material was not upgraded. There's no upgrader to convert MARS/Textured Doublesided Fresnel shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Object_Evaluate material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

VisualSpriteMaterial material was not upgraded. There's no upgrader to convert Sprites/Overlay shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PlaneSizeHandleMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Body Mat material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ProxyForceRegion_Touching material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Ceiling material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

StableFresnel material was not upgraded. There's no upgrader to convert MARS/Textured Doublesided Fresnel shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

EntityVisualBodySuitMaterial material was not upgraded. There's no upgrader to convert MARS/Textured Doublesided Fresnel shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

DecalMaterial material was not upgraded. There's no upgrader to convert MARS/FaceDecalShader shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SyntheticImageMarkerMaterial material was not upgraded. There's no upgrader to convert Unlit/Transparent shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Carpet material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

FloorVisualHighlightMaterial material was not upgraded. There's no upgrader to convert MARS/Floor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ParticleCollect_Shockwave material was not upgraded. There's no upgrader to convert MARS/Particle/Standard Unlit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimulatedPlaneMaterial material was not upgraded. There's no upgrader to convert Hidden/MARS/Synthetic Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

FloorVisualSelectedMaterial material was not upgraded. There's no upgrader to convert MARS/Floor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ProxyForceRegion_Empty material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

DistanceHandleMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ParticleCollect_Embers material was not upgraded. There's no upgrader to convert MARS/Particle/Standard Unlit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Object_Force_XRay material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

LabelPanelMaterial material was not upgraded. There's no upgrader to convert Sprites/Overlay shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

LiberationSans SDF - Overlay material was not upgraded. There's no upgrader to convert Hidden/InternalErrorShader shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Floor material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Offscreen Inside material was not upgraded. There's no upgrader to convert MARS/Particle/Standard Unlit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PlaneDataMaterial material was not upgraded. There's no upgrader to convert Custom/TransparentPulse shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Occlusion material was not upgraded. There's no upgrader to convert MARS/AR/Mask shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

LandmarkDropTargetMaterial material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ParticleCollect_Lightning material was not upgraded. There's no upgrader to convert MARS/Particle/Standard Unlit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

DistanceHandleLineMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PlaneSizeHandleLineMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Crystal material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Shared_Object material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ElevationHandleLineMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Offscreen Outside material was not upgraded. There's no upgrader to convert MARS/Particle/Standard Unlit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

EntityVisualMeshMaterial material was not upgraded. There's no upgrader to convert MARS/Textured Doublesided Fresnel shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

FloorVisualNormalMaterial material was not upgraded. There's no upgrader to convert MARS/Floor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

NoninteractableHandleMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

WorldScaleIconMaterial material was not upgraded. There's no upgrader to convert Sprites/Overlay shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Rug material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Suit Mat material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Glass material was not upgraded. There's no upgrader to convert MARS/Room X-Ray shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ProxyForceRegion_Occupied material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

ElevationHandleMaterial material was not upgraded. There's no upgrader to convert Unity/Handles/GizmoSolidColor shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

EntityVisualImageMarkerMaterial material was not upgraded. There's no upgrader to convert MARS/DoubleSidedUnlitTransparent shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PointCloud material was not upgraded. There's no upgrader to convert MARS Point Cloud shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

Inter-Regular SDF Overlay Material material was not upgraded. There's no upgrader to convert Hidden/InternalErrorShader shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PlaneDataOutlineMaterial material was not upgraded. There's no upgrader to convert Custom/TransparentPulse shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

BlankFaceMeshMaterial material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

PlaneFinding_Dots material was not upgraded. There's no upgrader to convert MARS/TriplanarSDF shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

DepthMask material was not upgraded. There's no upgrader to convert MARS/AR/Mask shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Object material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

SimEnvironment_Object_Accent material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)

UnitE material was not upgraded. There's no upgrader to convert MARS/Standard Lit shader to selected pipeline

UnityEditor.Rendering.Universal.UniversalRenderPipelineMaterialUpgrader:UpgradeProjectMaterials () (at Library/PackageCache/com.unity.render-pipelines.universal@10.10.0/Editor/UniversalRenderPipelineMaterialUpgrader.cs:25)