This paper describes issues and consideration on authoring of 3D visual content based on MPEG-4 Systems. The issues include types of 3D visual content; functionalities for user-interaction; 3D scene composition for rendering; and the 3D visual content file format. MPEG-4 includes several extensions compared to MPEG-1 and -2 especially in terms of object-based interactivity. In addition to advanced A/V compression methods (MPEG-4 Part2, Part3 and Part 10), MPEG-4 Part1, which is named "Systems", contains additional tools such as binary/textual file format, multiplexing, synchronization scheme, scene description, etc. The use of MPEG-4 can resolve the problem of format diversity while providing high interactivity to users. There has been little investigation on 3D visual content authoring. Throughout the paper, we will present which issues need to be determined and how currently available tools can be effectively utilized for 3D visual content creation.