Leo's Sketchbook

[darktiste]

I think you should practice converging line and parallel line.For isometric perspective it an other story you only have to worry about line being parallel it a much easier perspective to start with but it can be confusing when you introduce vanishing point concept as they don't have any.

One exercise i would advise is to create and stack of as many box with different orientation as you can until they touch the bottom and top of the page.