Doors & windows in Fiberglass body

Hi Everybody

I'm pretty new in the field of composites . I intent to construct a race car body out of fiberglass. I've a problem imagining how Doors can be made since I think that when a cutout is made in the body it'll cause large deformation that the door will not fit in . also i think that the door itself will be very elastic if it is cut directly from the body. to make it short , could anybody give me a short explanation of making Doors in fiberglass body . and if there is any resources explaining the process in details i'll be grateful .

If you're making a race car and you want to maximize structural rigidity, then don't make any doors in it at all.

If you really need doors, make them as small as practical and make sure you have decent returns on the door aperture to add stiffness and provide water proofing with suitable seals.