(1) SceneList

u32 scene_chain_root_link_num	Describes the number of ChainRoot nodes directly linked from the scene.
u32 external_obj_num	Describes the number of externally referenced Obj nodes.
u32 external_env_num	Describes the number of externally referenced Env nodes.
u32 external_cam_num	Describes the number of externally referenced Cam nodes.
u32 external_light_num	Describes the number of externally referenced Light nodes.
u32 scene_chain_root_link_index	Describes the index number for the ChainRoot nodes directly linked from the scene. If scene_chain_root_link_num = 0, there is no data.
u32 external_obj_file_name_index	Uses an ExternalNameList index number to specify the name of a file stored in the externally referenced Obj node. Please do not include the directory name etc. when describing the file name. This field is not described when external_obj_num = 0
u32 external_obj_name_index	Uses an ExternalNameList index number to describe the externally referenced Obj node name. This field is not described when external_obj_num = 0
u32 external_env_file_name_index	Uses an ExternalNameList index number to specify the name of a file stored in the externally referenced Env node. Please do not include the directory name etc. when describing the file name. This field is not described when external_env_num = 0
u32 external_env_name_index	Uses an ExternalNameList index number to describe the externally referenced Env node name. This field is not described when external_env_num = 0
u32 external_cam_file_name_index	Uses an ExternalNameList index number to specify the name of a file stored in the externally referenced Cam node. Please do not include the directory name etc. when describing the file name. This field is not described when external_cam_num = 0
u32 external_cam_name_index	Uses an ExternalNameList index number to describe the externally referenced Cam node name. This field is not described when external_cam_num = 0
u32 external_light_file_name_index	Uses an ExternalNameList index number to specify the name of a file stored in the externally referenced Light node. Please do not include the directory name etc. when describing the file name. This field is not described when external_light_num = 0
u32 external_light_name_index	Uses an ExternalNameList index number to describe the externally referenced Light node name. This field is not described when external_light_num = 0

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