Previously I do Interior Design presentation drawings manually using T-square, drafting board and architectural drawing tools. But the bad thing is I cannot 'undo' for any mistakes, of course :)

Since Adobe Illustrator introduce Perspective Tool few years back, I tried to draw some but never success.. the Perspective Tool seems (or it just me?) not helps much and I cannot change the angle - the 'vanishing point' distance, then I manually draw without using the Illustrator Perspective tool, just manuall method as I'm using 'virtual T-square' in Illustrator..