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ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightEvaluation.hlsl

                                                  lightData.angleScale, lightData.angleOffset);
 
 #if (SHADEROPTIONS_VOLUMETRIC_LIGHTING_PRESET != 0)
+    // TODO: sample the extinction from the density V-buffer.
     float distVol = (lightData.lightType == GPULIGHTTYPE_PROJECTOR_BOX) ? distances.w : distances.x;
     attenuation *= TransmittanceHomogeneousMedium(_GlobalExtinction, distVol);
 #endif

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Volumetrics/VolumeVoxelization.compute

     #define VBUFFER_SLICE_COUNT 128
 #endif
 
-#define SOFT_VOXELIZATION
-#define GROUP_SIZE_1D 8
+#define GROUP_SIZE_1D     8
+
+#define SOFT_VOXELIZATION 1 // Hack which attempts to determine the partial coverage of the voxel
 
 //--------------------------------------------------------------------------------------------------
 // Included headers
             float3 voxelCenterBS = mul(voxelCenterWS - obb.center, transpose(obbFrame));
             float3 voxelCenterUV = voxelCenterBS / obbExtents;
 
-        #ifdef SOFT_VOXELIZATION
+        #if SOFT_VOXELIZATION
-            // TODO: use v_cubeid_f32.
+            // TODO: use v_cubeid_f32.
             uint axisIndex; float faceDist;
 
             faceDist    = abs(obbExtents.y - abs(voxelCenterBS.y));

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Volumetrics/VolumetricLighting.compute

         // Sample the participating medium at 'tc' (or 'centerWS').
         // We consider it to be constant along the interval [t0, t1] (within the voxel).
         // TODO: piecewise linear.
-        // TODO: sample the accurate extinction values for lights.
         float3 scattering = LOAD_TEXTURE3D(_VBufferDensity, voxelCoord).rgb;
         float  extinction = LOAD_TEXTURE3D(_VBufferDensity, voxelCoord).a;
         float  asymmetry  = _GlobalAsymmetry;