If you have any need to provide a more hand-drawn look for a website, a client proposal, displays, or anything else, this is by far the easiest way to do it.
I am presenting classes in this at the upcoming Charlotte and Philadelphia CAD Camps.
Last week I attended a Photoshop seminar. I've never used the program and don't currently have it. I have had many clients over the years that use Photoshop to create a separate design for clients. It is a complex program and I would say that you need to know more than a one-day seminar to be able to create some of the stunning effects I've seen of proposed buildings.
The beauty of Impression is that you use your AutoCAD drawing so you are not reinventing the wheel. Plus, you don't have to have AutoCAD installed on your system so you could have someone in your office do your Impression designs. You can open or insert your AutoCAD files as well as many other file types.
Visit the Impression Community to learn more.

Also, I recommend the following material from the Autodesk University sessions.


