I'm new to the SDK and am finding it difficult to locate documentation on how to design an airport environment. I want to replace the autogen of an airport with my own buildings. I am familiar with gmax and 3d modeling.Can anyone direct me to a tutorial or recommend directed pages within the SDK help to look at? Thanks in advance.

I recommend going through the "beginners guide" topic in this forum. It was written for FS9, but the basic concepts are still valid for FSX. If you want to develop custom buildings, rather than using the generic building designer or library models, you will also need to learn and master a 3d graphics design tool, such as GMAX. You might also want to check out fsdeveloper.com , in particular for GMAX help.scott s..

Thanks, I'll give that a try. I wasn't sure how applicable the FS9 tutorials were. I have experience with Caligari Truespace, which can output 3d studio format amongst others.