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JoshuaVe
Inspiring
August 17, 2023
Solved

OVROverlay, underlays and Universal Render Pipeline (URP) doesn't work?

Has anyone gotten that combination of things to work?  Overlay works just fine with URP, so I'm assuming it's my attempts to punch out a hole that are failing.  I'm assuming Oculus' shader doesn't work with URP, as it renders pink in the preview -- but hey, maybe I'm wrong.

I've tried updating it to URP, and I've tried using a URP/Transparent shader, as I believe it's basically the same thing.  

I've tried using Render Object on the Universal Render Asset to ensure that we render at the proper time to punch a hole.  I set my Quad object to be on the Layer for the Render Object's LayerMask, and set the event to be After Rendering Opaques, and to override Depth, Write Depth, and Depth Test Greater.  That should result in it render my quad over anything that might be in the way... right?  I also tried Depth Test Always -- which should really always render my transparent thing and write it's depth.

But nothing every shows up on my Quest 2 when I'm set to Underlay.  (if I turn off rendering everything else in the scene, it works and I see it.)

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    JoshuaVeAnswer
    Inspiring
    August 18, 2023

    Okay, got it working, was a foreheadslapper where I'd forgotten I'd turned off a certain Layer on my camera -- the exact layer I was rendering my punchout quad on... eyeroll.

    My final URP punchout shader is fairly simple, I can share if anyone is curious.

     

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    6 replies

    JoshuaVeAuthorAnswer
    Inspiring
    August 18, 2023

    Okay, got it working, was a foreheadslapper where I'd forgotten I'd turned off a certain Layer on my camera -- the exact layer I was rendering my punchout quad on... eyeroll.

    My final URP punchout shader is fairly simple, I can share if anyone is curious.

     

      lohinimessa
      New Participant
      August 25, 2023

      Hello, Can you share your punchout shader?

      I was trying to use Oculus SDk's Underlay Impostor shader but it doesn't work with URP.

      Thank you.

      JoshuaVeAuthor
      Inspiring
      August 25, 2023
      Properties {
		_MainTex ("Albedo", 2D) = "white" {}
	}

	SubShader {
		Tags {
			"Queue" = "Transparent"
			"IgnoreProjector" = "True"
			"RenderType" = "Transparent"
			"RenderPipeline" = "UniversalPipeline"
		}

		Blend DstColor Zero
		Lighting Off
		ZWrite On
		ZTest LEqual

		Pass {
			Name "Forward"
			Tags { "LightMode" = "UniversalForward" }
			HLSLPROGRAM

			#pragma vertex vert
			#pragma fragment frag

			#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

			sampler2D _MainTex;

			CBUFFER_START(UnityPerMaterial)
			float4 _MainTex_ST;
			CBUFFER_END

			struct vertexIn
			{
				float4 vertex : POSITION;
				float2 texCoord : TEXCOORD0;
				UNITY_VERTEX_INPUT_INSTANCE_ID
			};

			struct vertexOut
			{
				float4 vertex : SV_POSITION;
				float2 texCoord : TEXCOORD0;
				UNITY_VERTEX_OUTPUT_STEREO
			};

			vertexOut vert(vertexIn v)
			{
				vertexOut output;

				UNITY_SETUP_INSTANCE_ID(v);
				UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);

				VertexPositionInputs vertexInputs = GetVertexPositionInputs(v.vertex.xyz);
				output.vertex = vertexInputs.positionCS;
				output.texCoord = TRANSFORM_TEX(v.texCoord, _MainTex);
				return output;
			}


			half4 frag(vertexOut input) : SV_Target
			{
				half4 outColor = tex2D(_MainTex, input.texCoord);
				clip( outColor.a < 0.1f ? -1:1 );
				return half4(outColor.xyz, 0);
			}

			ENDHLSL
		}
	}
        JoshuaVeAuthor
        Inspiring
        August 25, 2023

        It's a pretty simple shader, I adapted it from one on Unity's documentation.  If you don't need transparency in your output image, you can lose the clip.  

          lohinimessa
          New Participant
          August 25, 2023

          Thank you very much!

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