Forcing a user to locate something in a complex scene by looking at it from the top, side, and front, and then expecting him to triangulate in his head in real time is a bit much to expect, even from modeling whizzes.

• 迫使用户在复杂的情景中从顶上、侧面和前面各个角度定位对象，并期望他在大脑中实时进行三角测绘实在不容易，即使对于建模专家也是勉为其难的。