I had a few problems installing Autodesk impression 3 at first. This was because it requires a graphics card that can support pixel shader 2.0 or higher. In the end I had to get a new graphics card at the office.
Impression 3 is the latest piece of software from Autodesk (the people who make AutoCAD) that allows the user to create a more of a sketch like drawing.
I personally have been trying it out to see if it can make a working drawing look more like a hand drawn drawing.
The number of styles you can choose from is remarkable. You can choose from a pencil type style (all different types of pencil too like HB etc) to marker pens.
There is a textures style that can incorporate pictures of bricks and things but I personally think that it looks bad.
As in AutoCAD the user can insert blocks onto the canvas. this works extremely well because as I found, if you import a plan from AutoCAD into impression, impression will recognise all the trees etc as blocks, therefore if you insert a coloured tree block it will replace all the imported line drawings of trees and scale to the size of the original.
This feature alone is worth its weight in gold.
Overall it is a great piece of software. it takes a day or so to get to grips with it but once that's done then there are a great deal of possibilities, whether it be a plan of elevation or anything.
As an added bonus this software is free to anyone with an Autodesk subscription (also free for a year to students)