Bouncing Ball Squash & Stretch

Project info

• CategoryAnimation & Motion Graphics
• LevelBeginner
• ToolBlender 5.2.3 · Cycles
• TypeAnimation
• Price (one price)US$42

In the scene: Segmented rubber ball, cyclorama floor, wooden and painted toy blocks, cone, wooden cylinder, small ball

Techniques used

• Trajectory computed in script: gravity, 0.6 restitution, rolling friction, baked to per-frame keyframes
• Volume-preserving squash & stretch (XY = 1/sqrt Z) on an empty separate from rotation
• Damped spring (exponential x cosine) after impact for follow-through
• No-slip rolling rotation (angle = x / radius)
• Rubber shader: segmented radial gradient, noise roughness, micro bump, thin coat
• Track To camera on a lagging follow empty (smooth pan) + f/3.2 DOF
• Cycles motion blur, three area lights, AgX tone mapping

How it was made

1. 1Simulate the ball path in Python (1/4800 s steps)
2. 2Build Gerak > Squash > Ball hierarchy so squash stays perpendicular to the floor
3. 3Bake position, squash and rotation per frame
4. 4Create segmented rubber and satin cyclorama floor
5. 5Arrange background wooden toys and three area lights
6. 6Animate the follow camera, enable motion blur, render in Cycles

Scene statistics

• Polygons (triangles)42,190
• Objects15
• Materials7
• Lights3
• Render engineCycles
• Samples64
• Render time8 min 49 s
• Frames110 @ 24 fps (4.6 s)

Modifiers in the scene

• Bevel
• Subdivision Surface

Figures are read from the scene by Blender 5.2.3 LTS; the render time is for the poster frame and the whole clip on one RTX 4060 GPU.

Price and ordering

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