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For People Crazy About 2D Animation!

Acme Punched! is for people crazy about 2D animation. It may be enjoyed by beginners and others, but it is aimed at animators who know already something about the process of animation and the basics of character animation. In large part, it will attempt to provide a deep look into the problem solving that goes on in my head as I work out a scene, often in step-by-step posts that I will sometimes enter in "real time", without knowing in advance what the outcome will be. Mistakes and false starts will not only be included but emphasized, so that the creative process of animation will be portrayed realistically. And, while my own bias is for 2D drawn animation, many of the effects and principles discussed here can apply to CGI 3D animation as well. I hope the blog will prove useful and instructive for all.

-Jim Bradrick

Saturday, July 28, 2018

No. 164, Smear Drawings and How to Use Them

If you look back at the video in post No. 162, you will see the character, Nelson, glancing quickly right and left before going into his cringe. This was done with the use of smear drawings, which I have mentioned before. Chuck Jones The Dover Boys  makes use of this technique extensively for quick transitions, so if you have this cartoon on DVD or can find it on You Tube, take a look.

Here is how they are supposed to work, based on a supposition that the frame speed is 24 frames per second.

You create your starting pose, A...

... and your ending pose, B.


Then you do this weird inbetween drawing that will appear on one frame only; this is very important.

If the movement is left to right, you trace the left contour of drawing A, then the right contour of drawing B.
Contour A shown in Red.

Contour B shown in Blue.


Between those contours you handle the shape like a piece of taffy stretched across between the starting and ending contours.

As appropriate, include an arc of movement in this drawing.

The result will be a smear or blur that can be a quite effective transition. The viewer will not be able to focus on the inbetween but the effect will be of a smooth, although lightning fast, movement, rather like that of a bird suddenly moving its head.
Here is the smear tween laid over the two key drawings.
This is the smear tween alone.
This will work fine in black and white, but it works even better in full color.
Above, the three images in color.
Colors actually track better than lines. Here I have limited myself to just two colors, but more could also work. But more than 3 or 4 colors will not make the effect any better, and it is a lot of unnecessary work. They say that light colors track better than dark ones.

Let's now look at a video of this effect, created in Flipbook through Autodesk Sketchbook.

Note: For the best effect, try looping this video. See instructions at the top right of this page if you don't already know how.

When you loop the video, you will see that this effect--having no anticipation nor drag nor follow-through--works just as well backwards as forwards.  I hope you enjoy using this fun effect!

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