It is necessary to understand your client's requests precisely and to have your client agree with the arrangement of the house and any ideas for interior design. It is easier to accomplish this goal if you can quickly sketch out the arrangement and key elements of the interior design, rather than just giving your clients a verbal explanation. With "sketching while using simplified, minimal lines" as the theme, this book covers basic techniques - from 10 second sketching, to 3 minute sketching, to 5 minute sketching - effective use of light and shadow, speed colouring techniques, and techniques applied for sketching, etc., as well as the application of these techniques.
