This was a major problem for me when I started using Infraworks and needed to provide rendered images out of it as a deliverable. I think the render engine needs some work and would love to see the a360 cloud rendering feature added in, In the meantime i created a simple workflow that gets me results when I can get the message across using the screen grab tool. (Tip: When using 'Create Snapshot tool play with with 'Visual Effects' and set a high resolution 10240X4320 normal makes an image about 3.5mb or so)
So basically I can do three things (I have done a quick example with a project I am in now);
For the example I placed the sun in front of what I want to capture, This is the dirty and cheap version but you will get the idea.
1. Use 'Create Snapshot' in this particular image I upped the light intensity, touched the contrast and brightness and widened the perspective:

2. Use the Render module inside infraworks, but the sky and sun come out bland:

As you can see the colour tone is bad and no depth in the sky, the sun takes away the eye.
3. So generally i take this image and do some colour balance in photoshop and overlay a sunset photo i have in the background ( I am not photoshop expert and this is really easily done) This helps alot by getting a better resolution using HDR but allows use to control the balance of brightness and contrast.

These are completely test images and done really fast but you get the idea. (hopefully) I agree with the others and always try to have the light behind you but always play with the balances in 'Visual Effects' to help make sure the brightness doesn't get to out of control.
I have found photo shopping in sky's help not distract people as well.