Issues with Orthographic when using a camera

Hi

I’ve never been able to use Orthographic when setting up a camera for get some renders of my characters. Everything’s always fine in Perspective mode, but as soon as I toggle on Ortho, this happens…

Persp:

Ortho:

Everything’s much darker and things are clipping or not showing properly, such as the hair. I’ve tried playing around with the Clip Planes, but nothing seems to be fixing the problem very well. I’m just not sure what to do. What’s the workaround for this? Can anyone offer any suggestions? Thanks.