More correction + add unity convention comment

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Common.hlsl

 
 // Convention:
 
-// Unity is Y up - left handed
+// Unity is Y up and left handed in world space
+// Caution: When going from world space to view space, unity is right handed in view space and the determinant of the matrix is negative
+// For cubemap capture (reflection probe) view space is still left handed (cubemap convention) and the determinant is positive.
+
 // The lighting code assume that 1 Unity unit (1uu) == 1 meters.  This is very important regarding physically based light unit and inverse square attenuation
 
 // space at the end of the variable name

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/CommonLighting.hlsl

 #define UNITY_COMMON_LIGHTING_INCLUDED
 
 // These clamping function to max of floating point 16 bit are use to prevent INF in code in case of extreme value
-TEMPLATE_1_FLT(ClampToFloat16Max, value, min(value, HALF_MAX))
+TEMPLATE_1_REAL(ClampToFloat16Max, value, return min(value, HALF_MAX))
 
 // Ligthing convention
 // Light direction is oriented backward (-Z). i.e in shader code, light direction is -lightData.forward