3DS MAX – Micro Reference Manual – Modifiers – Animation – Flex

The Flex modifier simulates soft-body dynamics using virtual springs between an object’s vertices. You can set the springs’ stiffness, or how actively they keep vertices from coming close to each other, as well as stretch, or how far apart they can move. At its simplest, this system causes vertices to lag behind an object as it moves. At a more advanced level, you can also control the sway, or how much the spring angle can change.

With this modifier you can:

– animate a geometry

You can simulate:

– jelly
– pudding
– boobs :)

GENERAL

1. Create an object, create some keyframefram from left to right
2. Select the object, RIGHT COLUMN> Modify> Modifier List> OBJECT-SPACE MODIFIERS> Flex
3. RIGHT COLUMN> Modify> Flex> in the stack ‘Weights & Springs’> in the roolout ‘Weights and Painting’> ‘Paint’ button
4. Paint vertex in the viewport
5. Play the animation in real time

ERASE THE MODIFIER

RIGHT COLUMN> Modify> LMB over the modifier (blu highlight)> RMB over the modifier> Delete

Booooobs…

1. Create a sphere, create up and down keyframeframes
2. Select the sphere, RIGHT COLUMN> Modify> Modifier List> OBJECT-SPACE MODIFIERS> Flex
3. RIGHT COLUMN> Modify> Flex> in the stack ‘Weights & Springs’> in the roolout ‘Weights and Painting’> ‘Paint’ button
4. Setup Strenght: 1 (orange vertex) and paint where boob join the body, this vertex will have minimum jelly effect
5. Setup Strenght: -1 (blue vertex) and paint near nipple, this vertex will have maximum jelly effect