[can not get z depth from unlit shader]

Hello everyone!

Currently, I try to make z depth effect as Image Effect, but result image is not correctly rendered. something wrong...


If I use standard shader (unity 5), result image was correctly rendered(z depth image is ok), but not unlit shader.


what happen? if you have any idea, let me known!!



############Shader################

Shader "Custom/RenderDepth"
{
Properties
{
_DepthLevel ("Depth Level", Range(1, 3)) = 2
}
SubShader
{
Pass
{
CGPROGRAM

#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"

uniform sampler2D_float _CameraDepthTexture;
uniform fixed _DepthLevel;
uniform half4 _MainTex_TexelSize;

struct uinput
{
float4 pos : POSITION;
half2 uv : TEXCOORD0;
};

struct uoutput
{
float4 pos : SV_POSITION;
half2 uv : TEXCOORD0;
};


uoutput vert(uinput i)
{
uoutput o;
o.pos = mul(UNITY_MATRIX_MVP, i.pos);
o.uv = MultiplyUV(UNITY_MATRIX_TEXTURE0, i.uv);

return o;
}

fixed4 frag(uoutput o) : COLOR
{
float depth = UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, o.uv));
depth = pow(Linear01Depth(depth), _DepthLevel);
return depth;
}

ENDCG
}
}
}







############CS################

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
[RequireComponent (typeof(Camera))]
public class Test : MonoBehaviour
{
public Camera _cam;
public Material mat;

public float DepthLevel = 1.0F;

void Start ()
{
_cam.depthTextureMode |= DepthTextureMode.Depth;
}

void Update ()
{

}

void OnRenderImage (RenderTexture source, RenderTexture destination)
{
mat.SetFloat("_DepthLevel", DepthLevel);
Graphics.Blit(source, destination, mat);
}
}

 

hey same problem here, did you find a solution?
afaik the problem is that the unlit shader, as well as transparent shader and simple fragment shader dont write to depth buffer.

 

Yeah it seems that those unlit shader don't write into the depth buffer, I fell in that trap too. My guess is that these materials can be transparent (either a texture with alpha for "Unlit/Texture" or a color with alpha for "Unlit/Color") and in this case writing into the depth buffer doesn't make much sense ? I don't know...
Anyway I was able to use another shader (Toon/Basic) which gave me pretty much the same result as I don't have any lights in my scene.

 

Your missing a fallback for the shader, unity relies on shader replacment for the depth generation unless you are using deferred.
Add a fallback to your shader so it falls back to one of unity's unlit shaders and you should be fine.

 

Wich fallback?

 

VertexLit worked as a fallback for me.