#### This post is part of the "The Art & Science of Drawing" series.

# The Art & Science of Drawing - Weeks 3 & 4

**gonvalhector** - Monday, July 20, 2020

The next subject in The Art & Science of Drawing by Brent Eviston over on Skillshare turned out to be two weeks worth of lessons. How to draw objects volumetrically is without a doubt one of the most important skills I’ve learned in this class.

## Weeks 3 & 4 - Form & Space / 3D Drawing & Perspective

Drawing the **sphere** consists of adding *vertical* and *horizontal* **axis lines** to a **circle** and then drawing **ovals** using them as a base; indicating the **volume of the sphere**. We highlight one side of the oval to indicate the **orientation of the sphere**.

To draw **cubes** we need to know the type of **perspective** we are working from:

- In
**one point perspective**we utilize the**horizon line**or**eye level**to draw a single**vanishing point**; which is where our**perspective lines**ultimately meet. We draw the**cube**using those lines and making sure they all go back to the same**vanishing point**. - For
**two point perspective**, if it isn’t a bit obvious, we draw a couple of**vanishing points**along the**horizon line**, each one positioned as close to the edge of the line as it’s possible. - Lastly, on
**three point perspective**we use the two previous**vanishing points**, but now, instead of drawing perfectly vertical lines for the sides, we angle them*downwards*(or*upwards*) a little bit, simulating the existence of a third**vanishing point**way below (or above) our view.

In order to draw **cylinders** we start by drawing a **vertical axis line** for the body, then we draw two **horizontal axis lines** across it, each close to one of the edges. This will be our basis for the **ellipses** at the top and bottom. We draw the first one. No matter the orientation, this first shape should be slightly wider than the one oppose it (which we are yet to draw), since it’s supposed to be closer to us. We then draw two **vertical lines** coming from the sides of this **ellipse** that should angle *downwards* (or *upwards*) just like the **cubes** in **three point perspective**, and should end up meeting the other **horizontal axis line**. We draw a new **ellipse** here. This shape should be a bit more open than the first one, since it’s farther away in **canonical perspective**.

We can simplify the construction of more complex objects by dividing them into simpler, easier to draw shapes & forms, like **cylinders**, **spheres**, **ovoids** and **ellipses**. The planes of **boxes** can also be sliced to construct edges for other shapes.
**Boxes** can also simplify the construction of rims and handles, like the ones in cups. You simply draw the shape of the rim or handle in one of the planes and then move on to the next one, trying to preserve the correct perspective.

This couple of weeks were filled with a lot of fundamental concepts that helped solidifying in my mind the proper way to portray these shapes and form volumetrically within a drawing, adding so much to it’s realism.