What are the problems with using 3D environments over 2D environments?

To begin, the environments that we commonly know as 2D environments, are not 2D, they are 21/2D. This is so because; there are elements of dept in the environment i.e. windows placed on top of each other, etc.

People often find it difficult to understand 3D spaces and to perform actions in free space. Although, we do live in and act in a 3D world, the physical world contains many more clues for understanding how to more accurately simulate real world environments.

The major problem with using 3D environments is that it will take time to convert from using traditional systems. Some 3D systems I have seen, such as MaW3, a 3D GUI, which uses a 3D cursor in its environment. This process requires a space ball mouse to use the cursor because the cursor moves in 3D space. Maybe for hardcore users this might be appropriate but the aim of my concept is to make this as easy as possible to use. I’m thinking that a possible solution would be to combine the two environments. Use the 3D environment to display the information and use traditional 2D navigation techniques for navigation. In reality, 2D interaction offers a number of distinct advantages over 3D interaction techniques for certain tasks. According to some studies done in the field, 2D selection techniques are considered more efficient, even if further manipulation might require direct 3D interaction. “By taking advantage of the benefits of both interaction techniques, we can create interfaces for 3D applications that are easier to use and more intuitive for the user.”