Busy Dad Draws

[darktiste]

You got to learn how to measure where the center of a rectangle fall in perspective otherwise you will not  be able to properly create motif such as the one of that carpet .This is important to create fence for example. It also why your railway suffer from irregularity in the plank size.

Here some example of advance construction that use the principle mentioned above to create arch.

One other problem is related to putting the vanishing point inside the page which create visual distortion. I suggest looking more into the topic of the cone of vision.