The model of forestry scene normally contains a huge number of facets in simulation because of the complexity of the forest’s geometrical structure. How to simplify the model while keeping its visual effects to some degree is always a hot problem in the field of computer graphics. In this paper

an approach which fits the implementation of mass woods included natural scene walkthrough system is presented

which uses 3D modeling software 3ds max for scene model construction and uses OSG for real-time rendering and walkthrough. Taking good advantage of the existing software

this paper realized the walkthrough in mass woods included natural scene and the collision detection during walkthrough as well. Experimental results show that this system has high frame rate which meets the requirement of real-time walkthrough in mass woods including natural scene

while keeping good visual effects.