Rendering different objects and fov's

[andrewjworz]

I am creating a virtual forest, and I am wondering if there is any way I can do these two things:

1) First, I would like to switch the field of view after an event occurs. For example, I would like to load the scene,take some screen shots, and after I'm finished with the original fov, I would like to switch to a different field of view with a something like a "yield viztask.waitKeyDown()" event. How can I do this? Can this be done without using multiple scenes?

2) I would also like to initially load the virtual forest with planar-billboards, move the viewpoint through the world, and then substitute the planar billboard object with a 3d object based on some rule relating to my position in the world. For example, if a tree billboard is within 5 meters of the viewpoint, then render the tree as its corresponding 3d object rather than as a billboard. If the billboard is greater than 5 meters, rendering the tree as a billboard is okay. Is is possible to do this? If so, can you please outline the steps I will have to take. Can this be done without using multiple scenes?

-Andy