Bring forward the concept of realizing virtual environment based on software ;Illuminate the differences between virtual reality and simulation by comparing modes of interaction;Implement method to model virtual circumstance by 3D Modeling and rendering

Illuminate the steps to build virtual scene with model based method: Describe the frame of object with geometry principle

Add material and light to the frame

Render it to virtual scene which look like reality;Advance the method to improve the real time of virtual scene

In order to make scenes more efficiently rendered

Combine levels of details with fuzzy math

Display the objects in different distance at different levels of detail: Render object in far distance in low details

Render closer object in fuller details. Using virtual and enhanced reality technology

Combine image and model to improve real time: Take pictures of the static object such as background

Construct the virtual static scene with texture mapping technology

Immerge the objects modeled to be manipulated in the virtual static scene

Merge modeling based method into image based method to improve real time of interaction.