I'm new to design and have found this style of chart in an annual report. I have, with permission, decomposed the chart to see how it was made 1) is the original, 2) removed the centre ring, 3) the outer ring (and showing that it is two different charts, and 4) the plain chart. The second image shows image 4) after removing all the clipping masks (note the centre circle chart represents the clipping masks)
It would appear that a photoshop vector image has been used as a base for each of the wedges. I tried to recreate using the same colours, however, in AI they appear flat and lifeless, not at all like the images below. Does anyone know how to make a nice version of this chart that appears to have depth using Illustrator?