I for one am for option three, and I can see where you are going with this, as for 3D rendering, that would be nice with IVA, but let's be realistic here. That's alot of work that will hinder the game more then needed, I can see as some kind of expantion pack down the line, but not for something right now. I also would like to add in that the idea of crew transfer though the station could also be helped by travel time for the Kerbal to go from point a to point b, in that he would start off in one area and then a progress bar could show with him going to the next in place of a view of him traveling though said compartments, And to take this a step further, you can take into account the Kerbal's Bravery and stupdity. Think about it like this, the more Brave the Kerbal is, the faster he will go though the station to his destnation, but this can also hurt him if he's got a high stupdity, which could have him go to take a wrong turn and end up going out an airlock or damaging a part of the interal structure which could be fixed with supplies, time, and a Kerbal to fix the issue. To get back to this point, the higher the Kerbal's Bravery is, the faster he goes, but has a chance for damaing things or taking a wrong turn, oposit could have the Kerbal being slower and taking more time, but this could also lead to being helpful if an area might have damage which can be reported after a crew transfer and only IF it happens to be there. Stupdity could have the Kerbal get lost easier, damage things on the way, or just end up causing something of a risk, mind you this idea is bearly thought out and figure that it would be an intersting idea on top of crew systems to get people to have a risk reward system in place. Either way, a Kerbal's stats could effect how effecently he takes his time to get from point a to point b. This again is only just something that could enhance the experince if done right, and again, this can be done without haveing to render anything. What do you think? I for one like this idea because it has also the potnetional for responce time for dealing with damage to stations or crafts, and if your kerbal can get to a section in time, he could save a crew in trouble or fix a compartment so it wouln't have to be jettusoned because it endangers the rest of the station. Again this is mostly for things down the line, but the potential this system can add a ton of dynamic features while would be cool to look at, is better if only seen in text messages like when you are transmitting data or using the mobile lab.