Add a TODO

ScriptableRenderPipeline/Core/ShaderLibrary/VolumeRendering.hlsl

         float z1 = DecodeLogarithmicDepth(d1, VBufferDepthEncodingParams);
 
         // The sampler will clamp to edge.
+        // TODO: adjust the texture coordinate and take a single HW trlinear sample.
         float4 L0 = SAMPLE_TEXTURE3D_LOD(VBufferLighting, linearClampSampler, float3(uv, d0), 0);
         float4 L1 = SAMPLE_TEXTURE3D_LOD(VBufferLighting, linearClampSampler, float3(uv, d1), 0);
 

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

         // We use hardware trilinear filtering.
         // In theory, this is wrong, since the distance between slices is log-encoded.
         // In practice, doing the right thing in a loop is simply too expensive.
+        // TODO: adjust the texture coordinate and take a single HW trlinear sample.
         return SAMPLE_TEXTURE3D_LOD(VBufferLighting, trilinearSampler, float3(uv, d), 0);
     }
     else