+Synopsis+

The upcoming Mobile AR Template exposes Console Warnings for ARKitBackground shader.  

+Configuration+

Unity 2022.3.13f1

MacBook Pro — Intel

Mobile AR Template (com.unity.template.mobile-ar-template, branch: main, commit: 879fd5c2)

ARF 5.1.0

iPad Pro (11-inch)(2nd generation) iOS 15.3.1

+How to See the Bug+

Attach an iPhone or iPad to your computer. 

Use Unity 2022.3.13f1 to open the repro project; open Assets/Scenes/SampleScene. 

File > Build Settings > Set build target to iOS. 

File > Build Settings > Build

Build succeeds, but note Console warnings (see below). This is the bug. 

+Note+

These Console Warnings occur regardless of the Depth Texture Mode choice (After Opaques, After Transparents, or Force Prepass). 

Assets > Settings > URP-Performant-Renderer > Rendering > Depth Texture Mode

+Console Warnings+

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Shader warning in 'Unlit/ARKitBackground/AfterOpaques': 'mul': implicit truncation of vector type at line 110 (on metal)

Compiling Subshader: 0, Pass: ARKit Background Occlusion Handling, Vertex program with ARKIT_BACKGROUND_URP ARKIT_ENVIRONMENT_DEPTH_ENABLED

Platform defines: SHADER_API_MOBILE UNITY_ENABLE_REFLECTION_BUFFERS UNITY_FRAMEBUFFER_FETCH_AVAILABLE UNITY_LIGHTMAP_DLDR_ENCODING UNITY_NO_DXT5nm UNITY_NO_RGBM UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF3

Disabled keywords: ARKIT_HUMAN_SEGMENTATION_ENABLED SHADER_API_GLES30 UNITY_ASTC_NORMALMAP_ENCODING UNITY_COLORSPACE_GAMMA UNITY_ENABLE_DETAIL_NORMALMAP UNITY_HALF_PRECISION_FRAGMENT_SHADER_REGISTERS UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_LIGHTMAP_FULL_HDR UNITY_LIGHTMAP_RGBM_ENCODING UNITY_LIGHT_PROBE_PROXY_VOLUME UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_FULL_STANDARD_SHADER UNITY_PBS_USE_BRDF1 UNITY_PBS_USE_BRDF2 UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_SPECCUBE_BLENDING UNITY_SPECCUBE_BOX_PROJECTION UNITY_UNIFIED_SHADER_PRECISION_MODEL UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_VIRTUAL_TEXTURING

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Shader warning in 'Unlit/ARKitBackground/AfterOpaques': 'mul': implicit truncation of vector type at line 300 (on metal)

Compiling Subshader: 0, Pass: AR Camera Background (ARKit), Vertex program with ARKIT_BACKGROUND_URP

Platform defines: SHADER_API_MOBILE UNITY_ENABLE_REFLECTION_BUFFERS UNITY_FRAMEBUFFER_FETCH_AVAILABLE UNITY_LIGHTMAP_DLDR_ENCODING UNITY_NO_DXT5nm UNITY_NO_RGBM UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF3

Disabled keywords: ARKIT_ENVIRONMENT_DEPTH_ENABLED ARKIT_HUMAN_SEGMENTATION_ENABLED SHADER_API_GLES30 UNITY_ASTC_NORMALMAP_ENCODING UNITY_COLORSPACE_GAMMA UNITY_ENABLE_DETAIL_NORMALMAP UNITY_HALF_PRECISION_FRAGMENT_SHADER_REGISTERS UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_LIGHTMAP_FULL_HDR UNITY_LIGHTMAP_RGBM_ENCODING UNITY_LIGHT_PROBE_PROXY_VOLUME UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_FULL_STANDARD_SHADER UNITY_PBS_USE_BRDF1 UNITY_PBS_USE_BRDF2 UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_SPECCUBE_BLENDING UNITY_SPECCUBE_BOX_PROJECTION UNITY_UNIFIED_SHADER_PRECISION_MODEL UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_VIRTUAL_TEXTURING

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Shader warning in 'Unlit/ARKitBackground': 'mul': implicit truncation of vector type at line 104 (on metal)

Compiling Subshader: 0, Pass: , Vertex program with ARKIT_BACKGROUND_URP

Platform defines: SHADER_API_MOBILE UNITY_ENABLE_REFLECTION_BUFFERS UNITY_FRAMEBUFFER_FETCH_AVAILABLE UNITY_LIGHTMAP_DLDR_ENCODING UNITY_NO_DXT5nm UNITY_NO_RGBM UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF3

Disabled keywords: ARKIT_ENVIRONMENT_DEPTH_ENABLED ARKIT_HUMAN_SEGMENTATION_ENABLED SHADER_API_GLES30 UNITY_ASTC_NORMALMAP_ENCODING UNITY_COLORSPACE_GAMMA UNITY_ENABLE_DETAIL_NORMALMAP UNITY_HALF_PRECISION_FRAGMENT_SHADER_REGISTERS UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_LIGHTMAP_FULL_HDR UNITY_LIGHTMAP_RGBM_ENCODING UNITY_LIGHT_PROBE_PROXY_VOLUME UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_FULL_STANDARD_SHADER UNITY_PBS_USE_BRDF1 UNITY_PBS_USE_BRDF2 UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_SPECCUBE_BLENDING UNITY_SPECCUBE_BOX_PROJECTION UNITY_UNIFIED_SHADER_PRECISION_MODEL UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_VIRTUAL_TEXTURING

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