koobas.hobune.stream
How to generate Cubemap with color and depth values?
I am looking for the best way to generate a Cubemap with color + depth values in Unity 5.3.
I already have a shader that writes color in the RGB channels and Depth in the alpha channel, but how do I use-it for a CubeMap?
Possible solutions I see:
A) Use a reflection probe + the replacement shader mentioned above...but is it possible at all? I couldn't find any information about how to configure the camera used by the reflection probe so that it uses a replacement shader.
B) Without reflection Probe: use a secondary camera and call Camera.GenerateCubemap, having first called Camera.SetReplacementShader with the shader mentioned above.
Or maybe there's a better approach? Any help / comment / feedback will be appreciated, thanks! :)
Did you manage to solve this by any chance? I'm also facing this issue. I attempted to use a replacement shader, however camera's depth capture doesn't seem to capture all six faces of the cube.
Yes Alamir, apparently there's no way to use a replacement shader with a reflection probe, but the B) variant is working for me.
I am generating the depth values myself in the fragment shader, so I don't use the camera's depth buffer at all, like this:
CGPROGRAM
#pragma surface surf Standard fullforwardshadows nolightmap vertex:vert keepalpha
#pragma target 3.0
sampler2D _MainTex;
half _Glossiness;
half _Metallic;
fixed4 _Color;
struct Input
{
float2 uv_MainTex;
float4 screenPos; // Position in screen-space
};
void vert(inout appdata_base v, out Input o)
{
UNITY_INITIALIZE_OUTPUT(Input, o);
}
void surf (Input IN, inout SurfaceOutputStandard o)
{
fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
o.Albedo = c.rgb;
o.Metallic = _Metallic;
o.Smoothness = _Glossiness;
// Calculate depth and store it into the alpha-channel
// => Use built-in function to convert to Linear [0; 1] range
//-----------------------------------------------------------------------
float fragmentDepth = Linear01Depth((0.5 * IN.screenPos.z / IN.screenPos.w) + 0.5);
o.Alpha = fragmentDepth;
}
#ENDCG
NOTE: it's very important to specify keepalpha for the surface shader, otherwise the alpha value, which should contain the depth, will be overwritten and set to 1.
