Default RenderPipeline - Reflection Probes > biquadratic instead of bilinear sampling

Hi everyone,

I'd like to have a real-time reflection prob attached to a cam. I need a small 64/128pix cube reflection only.
But this caused some wired artifacts on moving because the reflection probe is sampled bi-linear (I think..)

Some time ago I created another approach on biquadratic sampling. Inigo Quilez cretaed a demo at shadertoys from it. https://www.shadertoy.com/view/WtyXRy. I like to use my approach for a reflection probe,

Code (CSharp):

1.  
2. //Roger/iq style
3.    p = p*texSize;
4.    vec2 i = floor(p);
5.    vec2 f = fract(p);
6.    p = i + f*0.5;
7.    p = p/texSize;
8.     //f = f*f*(3.0-2.0*f); // optional for extra sweet
9.    float w = 0.5/texSize;
10.    return mix(mix(texture2(sam,p+vec2(0,0)),
11.                    texture2(sam,p+vec2(w,0)),f.x),
12.                mix(texture2(sam,p+vec2(0,w)),
13.                    texture2(sam,p+vec2(w,w)),f.x), f.y);
14.  

I tried to find the shader part it's rendering the reflection probes. But didn't find anything related to reflection probes using texCube or texCubeBias, texCubegrade or similar.

Looked also at unity_SpecCube0_HDR, unity_SpecCube1_HDR, unity_SpecCube0_ProbePosition, but these variables are never filled with any texCube_xxx sampler pixels.

Does anyone know where to find the code to access a reflection probe cube by tex sampler?
Thanks a lot..

 

https://github.com/TwoTailsGames/Un...CGIncludes/UnityImageBasedLighting.cginc#L544

 

Thank you very much bgolus and being a part of the unity forum and your great acknowledge.