> NB one other possibility for the future is interactive control of the camera
> position via some means - I've no idea how we could make this portable, which
> is the main issue as far as I'm concerned, and if it can't be portable we may
> not do it. However the code is mostly already present to allow this to happen
> (in terms of being able to send a new camera position to an already-rendering
> view).

I'm no C expert, but I would think that using different keypresses to 
rotate and translate the camera would be the simplest thing in terms of 
portability.

If you also add a keypress to add a "headlight" to the camera, this 
might actually be quite useful for "exploring" a scene to figure out why 
it doesn't look the way you were expecting. You sometimes find that the 
camera location you're using gives you a misleading impression of where 
you've placed stuff, or that you have things to reflect which are 
themselves out of shot, and you haven't placed them where you thought 
you did. And so on.

Still, I presume nobody is going to get realtime performance with media 
or radiosity turned on. ;-)

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