Above is a fine example of "Flour Sack" animation by Animation Apprentice student Joshua Reynolds, using the free flour sack rig, available for download online. The flour sack rig is one we like to use in the early stages of learning animation, so that students can get used to the idea of creating the illusion of weight, and also getting a performance from an inanimate object.
The Flour Sack
The idea of making a flour sack give a performance dates back to the early days of the Walt Disney studios, when senior animators would test the mettle of aspiring junior animators by getting them to do thumbnail sketches of sacks of flour, to see if they could get an emotional and interesting pose that communicated an idea clearly.
The idea was, if you can get a great pose out of a sack of flour - you can do it with anything.
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| Rockin' Rooster |
The idea of making a flour sack give a performance dates back to the early days of the Walt Disney studios, when senior animators would test the mettle of aspiring junior animators by getting them to do thumbnail sketches of sacks of flour, to see if they could get an emotional and interesting pose that communicated an idea clearly.
The idea was, if you can get a great pose out of a sack of flour - you can do it with anything.
There are in two flour sack rigs we recommend. The first, shown above and right, is the Rockin' Rooster flour sack by key-framer, which you can download free at Creative Crash.
Rockin' Rooster Flour Sack Rig
Getting started
To animate effectively with the Rockin' Rooster flour sack rig, first start by selecting the two square red and green feet controls on the flour sack rig (shown right) and, in the channel box, change the Parent setting from World to Main.
This will make sure that the feet follow the Main Body Control, which will make the flour sack much easier to animate.
How do I stop the red and green colour blocks on his feet showing up in my renders?
Put the colour blocks on a new layer in the Layer Editor, then toggle the layers visibility - it won't be visible in the render.
I'm getting weird shapes on the rig - what shall I do?
Note that this is an easy rig to break. Don't stretch or bend it too far else it will start to break apart. If you are getting weird deformations, try zeroing out some of the values in the Channel Box.
The most common mistake made by animators with the Rockin' Rooster flour sack rig is to animate too many control curves at once - and breaking the rig. The flour sack will distort easily so be careful you don't break it.
Joe Daniels' Flour Sack Rig
Posing Tips
Joe recommends "thinking of the yellow cylinder controls (Top_Control and Bottom_Control) as the primary first-pass pose controls, and pose them first. The shoulder controls have an attribute that sets whether they follow the hierarchy, or are free to stick to the world. You may want to change this, depending on your scene."
To see examples of cool animation done by our students using these rigs, check out the examples below:
1. A Floury Ending - flour sack leap by Lee Caller
Rockin' Rooster Flour Sack Rig
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| Flour Sack expressions from "Illusion of Life" |
This will make sure that the feet follow the Main Body Control, which will make the flour sack much easier to animate.
How do I stop the red and green colour blocks on his feet showing up in my renders?
Put the colour blocks on a new layer in the Layer Editor, then toggle the layers visibility - it won't be visible in the render.
I'm getting weird shapes on the rig - what shall I do?
Note that this is an easy rig to break. Don't stretch or bend it too far else it will start to break apart. If you are getting weird deformations, try zeroing out some of the values in the Channel Box.
The most common mistake made by animators with the Rockin' Rooster flour sack rig is to animate too many control curves at once - and breaking the rig. The flour sack will distort easily so be careful you don't break it.
The second rig we like is also downloadable for free at Gumroad. It was created by Joe Daniels and it's a great little rig, created for "Maya 2013 and up". However it may have some problems in Maya 2018, so handle with care.
Posing Tips
Joe recommends "thinking of the yellow cylinder controls (Top_Control and Bottom_Control) as the primary first-pass pose controls, and pose them first. The shoulder controls have an attribute that sets whether they follow the hierarchy, or are free to stick to the world. You may want to change this, depending on your scene."
To see examples of cool animation done by our students using these rigs, check out the examples below:
1. A Floury Ending - flour sack leap by Lee Caller
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