double point perspective is probably two point perspective which is just instead of using one point like in one point perspective, there are two points that come from the eyeline/horizon line.
Here is a simple link on what and how to draw two point perspective.
http://drawsketch.about.com/library/weekly/aa021603c.htm
Two point perspective.
I believe it is just called one-point perspective.
In a linear perspective picture, all lines that create Depth will go towards ONE perspective point. Example: http://www.ider.herts.ac.uk/school/courseware/graphics/images/1point_kitchen.gif This is also known as one-point perspective. This kind of perspective is generally used when you are facing directly at an object A 2-point perspective is exactly the same, only instead of 1 set of lines for depth going towards the 1 perspective point, there are two. Example(s): http://www.utdallas.edu/~mel024000/pages/ill_space.html This kind of perspective is generally used when you want to get the angle/corner of an object A 3-Point perspective is, again similar to the other two, only now you're including a 3rd point which is used to direct the vertical lines to give a sense of height. Example: http://www.andrewdiec.com/Perspective/3Point.jpg This kind of perspective is generally used when displaying large buildings to give a sense of great height.
angular?
The image would appear distorted and not realistic
There are six types of perspectives that artists use in their day to day lives. The six types of perspectives includes: one point perspective, two point perspective, three point perspective, four point perspective, five point perspective and a six point perspective.
Single-point perspective uses only one vanishing point, whereas multiple-point perspective uses two or more vanishing points.
Single-point perspective uses only one vanishing point, whereas multiple-point perspective uses two or more vanishing points.
single point is smaller while multiple point is larger
Positioning is the main difference between one-point and two-point perspectives. One-point perspective uses one vanishing point while two-point perspective uses two.
One-point perspective has only one vanishing point.
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you have to know how to use these: shading, 1 point perspective, and 2 point perspective.
One-point perspective has only one vanishing point.
Single-point perspective
Two point perspective.
A personal perspective is something seen from one person's view point. This view point will be different from another view point.