Attached Link: IBL tutorial

IBL lighting by itself is far too ambient. It brings out a lot of details, but it makes everything look flat.  Try lowering the intensity of the IBL (which does not have any specular capabilities BTW), and add a spotlight for shadows and specularity.

This is a straight P6 Firefly render.  No postwork, using one IBL low intensity light ( with a peach and warm yellow radial gradient style image used as the source image, and a lilac colored spotlight:

If I can get these results without postwork, so can you.  It just takes some practice.

There is alo a great tutorial at RDNA by Olivier in the P6 forum on how to get the most out of IBL and AO lighting