BlinnPhong with Environment Lighting Reflection

Hi shaderer

I'd like to start writing more CG shader, but not a phong from scratch.
I'd like to start with the BlinnPhong that cover the flexibility that I want (Tesselation + Specular).
https://docs.unity3d.com/2018.3/Documentation/Manual/SL-SurfaceShaderTessellation.html

How I can "enable" the environment reading for the reflection ?
The default sky, or the HDRI map that we link here:
Windows / Lighting / Settings ...

Thx

 

Either by not using the BlinnPhong lighting function, which doesn't use the reflection probe, or by sampling it as part of your surface function.

float4 envSample = UNITY_SAMPLE_TEXCUBE(unity_SpecCube0, IN.worldRefl);
float4 reflections = DecodeHDR(envSample, unity_SpecCube0_HDR);

You can get the worldRefl by adding it to your Input struct.
https://docs.unity3d.com/Manual/SL-SurfaceShaders.html

If you're using normal maps there's a bit more work that's needed, but check the documentation above.

 

Thx @bgolus you're a beast answering everything