lightmap sample functions should return real. Fixed f on constants and DLDR typo.

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/EntityLighting.hlsl

 // (But these kind of platform should use regular render loop and not news shaders).
 
 // RGBM lightmaps are currently always gamma encoded, so we use a constant of range^2.2 = 5^2.2
-#define LIGHTMAP_RGBM_RANGE 34.493242f
+#define LIGHTMAP_RGBM_RANGE 34.493242
-// DLRD lightmaps are currently always gamma encoded, so we use a constant of 2.0^2.2 = 4.59
-#define LIGHTMAP_DLDR_RANGE 4.59f
+// DLDR lightmaps are currently always gamma encoded, so we use a constant of 2.0^2.2 = 4.59
+#define LIGHTMAP_DLDR_RANGE 4.59
 
 // TODO: This is the max value allowed for emissive (bad name - but keep for now to retrieve it) (It is 8^2.2 (gamma) and 8 is the limit of punctual light slider...), comme from UnityCg.cginc. Fix it!
 // Ask Jesper if this can be change for HDRenderPipeline
 real3 UnpackLightmapRGBM(real4 rgbmInput)
 {
     // RGBM lightmaps are always gamma encoded for now, so decode with that in mind:
-    return rgbmInput.rgb * pow(rgbmInput.a, 2.2f) * LIGHTMAP_RGBM_RANGE;
+    return rgbmInput.rgb * pow(rgbmInput.a, 2.2) * LIGHTMAP_RGBM_RANGE;
 }
 
 real3 UnpackLightmapDoubleLDR(real4 encodedColor)
     return (decodeInstructions.x * pow(alpha, decodeInstructions.y)) * encodedIrradiance.rgb;
 }
 
-float3 SampleSingleLightmap(TEXTURE2D_ARGS(lightmapTex, lightmapSampler), float2 uv, float4 transform, bool encodedLightmap)
+real3 SampleSingleLightmap(TEXTURE2D_ARGS(lightmapTex, lightmapSampler), float2 uv, float4 transform, bool encodedLightmap)
-    float3 illuminance = float3(0.0, 0.0, 0.0);
+    real3 illuminance = real3(0.0, 0.0, 0.0);
-        float4 encodedIlluminance = SAMPLE_TEXTURE2D(lightmapTex, lightmapSampler, uv).rgba;
+        real4 encodedIlluminance = SAMPLE_TEXTURE2D(lightmapTex, lightmapSampler, uv).rgba;
         illuminance = DecodeLightmap(encodedIlluminance);
     }
     else
     return illuminance;
 }
 
-float3 SampleDirectionalLightmap(TEXTURE2D_ARGS(lightmapTex, lightmapSampler), TEXTURE2D_ARGS(lightmapDirTex, lightmapDirSampler), float2 uv, float4 transform, float3 normalWS, bool encodedLightmap)
+real3 SampleDirectionalLightmap(TEXTURE2D_ARGS(lightmapTex, lightmapSampler), TEXTURE2D_ARGS(lightmapDirTex, lightmapDirSampler), float2 uv, float4 transform, float3 normalWS, bool encodedLightmap)
 {
     // In directional mode Enlighten bakes dominant light direction
     // in a way, that using it for half Lambert and then dividing by a "rebalancing coefficient"
     // transform is scale and bias
     uv = uv * transform.xy + transform.zw;
 
-    float4 direction = SAMPLE_TEXTURE2D(lightmapDirTex, lightmapDirSampler, uv);
+    real4 direction = SAMPLE_TEXTURE2D(lightmapDirTex, lightmapDirSampler, uv);
-    float3 illuminance = float3(0.0, 0.0, 0.0);
+    real3 illuminance = real3(0.0, 0.0, 0.0);
-        float4 encodedIlluminance = SAMPLE_TEXTURE2D(lightmapTex, lightmapSampler, uv).rgba;
+        real4 encodedIlluminance = SAMPLE_TEXTURE2D(lightmapTex, lightmapSampler, uv).rgba;
         illuminance = DecodeLightmap(encodedIlluminance);
     }
     else
-    float halfLambert = dot(normalWS, direction.xyz - 0.5) + 0.5;
+    real halfLambert = dot(normalWS, direction.xyz - 0.5) + 0.5;
     return illuminance * halfLambert / max(1e-4, direction.w);
 }