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uint visibility_for_tracing() const;		uint visibility_for_tracing() const;

/* Returns the index that is used in the kernel for this object. */		/* Returns the index that is used in the kernel for this object. */
int get_device_index() const;		int get_device_index() const;

/* Compute step size from attributes, shaders, transforms. */		/* Compute step size from attributes, shaders, transforms. */
float compute_volume_step_size() const;		float compute_volume_step_size() const;

		/* Check whether this object requires volume sampling (and hence might require space in the
		* volume stack).
		*
		* Note that this is a naive iteration over sharders, which allows to access information prior
		* to `scene_update()`. */
		bool check_is_volume() const;

protected:		protected:
/* Specifies the position of the object in scene->objects and		/* Specifies the position of the object in scene->objects and
* in the device vectors. Gets set in device_update. */		* in the device vectors. Gets set in device_update. */
int index;		int index;

/* Reference to the attribute map with object attributes,		/* Reference to the attribute map with object attributes,
* or 0 if none. Set in update_svm_attributes. */		* or 0 if none. Set in update_svm_attributes. */
size_t attr_map_offset;		size_t attr_map_offset;
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