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point – The sampled point.

pointReference – The shading point in reference space. 

pointObject/Camera – The sampled point in object/camera space.

normal – The surface normal for the sampled point.

normalReferece – The smooth normal in reference space. 

normalCamera/Object – The surface normal for the sampled point in object/camera space.

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view_dir – The view direction.

frame_time – The current frame (image) time. 

ray_time – The ray time between the motion blur interval. 

facing_ratio – Returns a number between 0 and 1 that specifies if the sampled point is facing towards or away from the camera.

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flipped_normal – Specifies which side of the surface is sampled.

cameraNearClipPlane – The camera near clipping plane, calculated from the scene bounding box and the camera transform in the frame data. 

cameraFarClipPlane – The camera far clipping plane, calculated from the scene bounding box and the camera transform in the frame data. 

uvCoord – The UV coordinates for the sampled point.

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tangentVCamera – The surface tangent in the V direction for the sampled point.

ray_depth – The ray depth. 

path_length – The path length. 

object_id – Returns the object ID for the object at the sampled point.

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