Isometric and Oblique Sketching

Today, we did isometric and oblique sketching. It was mostly easy, but I can see how more complicated sketches can become challenging. Isometric and oblique sketching are very important to engineering. They are types of sketching that help interpret and express ideas to the world. They also do it in a way that make the objects seem 3-dimensional on a sheet of paper. This really helps bring objects to life as well as helps work out proper dimensions for objects or new inventions.

1. What are the advantages and disadvantages to using an isometric pictorial compared to using an oblique pictorial in technical drawings?

One advantage is that in isometric pictorial sketching, you are able to see more of the object. Since it is at angle, the object can be exposed on its side, back, and front all at once. This can be done using an oblique sketch, but each side is not shown as much as the other. Obliques are just straight-on views, while isometric sketches show an equivalent amount of three side.

2. What is the difference between a two-dimensional sketch and an isometric sketch?

Although isometric sketches are two-dimensional, they show a third dimension using angles. A 2D sketch is great, but the 3rd dimension gives you a feel of the length, width, and depth measurements as well as a clearer picture of what it will look like in real life.

3. Why do designers use tonal shading?

Tonal shading helps show different depths in parts of an object. For example, the images below. In image one, the isometric sketches are shaded. Number two is a good example, for you can tell what is what. In image two, number one, the same shape is shown. It is hard to comprehend parts of this shape, like the two “legs” shown. They look like “legs” when shaded, but when it’s not, it looks like it has a triangular prism in between it. This can be confusing when trying to show others. In conclusion, shading helps show the difference between the length, depth, and width of an object.

Image  One

Image Two