BLENDER ADD-ON · DOCUMENTATION

Speed Graph Editor

Keyframes decide where. The graph decides how it gets there.

v1.0.0  ·  Blender 4.2+  ·  Oculis.studios

ONE CURVE · EVERY CHANNELNON-DESTRUCTIVEBLENDER 4.2+

01

Install

1. In Blender: Edit → Preferences → Add-ons → Install from Disk…

2. Choose speed_graph_editor.zip.

3. Enable Animation: Speed Graph Editor.

4. In the 3D viewport press N and open the Speed tab.

It ships as an extension package, so it installs the same way on every supported version — 4.2 LTS, 4.5 LTS, 5.0 and 5.2 LTS included.

02

How it works

Keyframes fix the timing of an animation — where it is at a given moment. The graph fixes the spacing — how the in-between frames distribute. Two animations can have identical keyframes on identical frames and feel completely different, and that difference is entirely spacing.

The curve is a multiplier. 1.0× means the speed you authored. Its cumulative integral maps each output frame back to a moment in your source animation, and your keyframes never move.

That integral is normalised, which is what conserves the area under the curve. Push one part up and the animation has to give that time back somewhere else — the same behaviour as the After Effects speed graph, and a direct consequence of the keyframe values being fixed.

03

Getting started

Works on any object with an action — location, rotation, scale, custom properties, anything with keyframes. All channels retime together from the one curve.

1. Select the object.

2. N → Speed tab → Set Up Speed Graph.

3. Drag a point. The motion rebuilds live and the playhead follows, so you see the frame you are shaping.

4. Press Space. That is where it reads.

Your animation is copied to a *_SGSource action with a fake user, and a working *_Retimed action takes its place. From then on the source is the truth, and the retimed action is rebuilt from it on every change.

04

The panel

Everything lives in 3D Viewport → N-panel → Speed.

05

The graph

A flat line at 1.0× is your animation untouched. Everything else is relative to that.

Endpoints move vertically but not horizontally — they are the start and end of the animation.

Reading it

Dashed line at 1.0× — base speed, the flat shape every animation starts as.

Colour — blue below 1×, gold at 1×, red beyond 2×. Keyed to base speed rather than to the view, so it means the same thing at any zoom.

Filled area — more area means more of the animation spent there.

Teal line — the measured ramp: the object's real speed in scene units per second, scaled by its own average so it shares the 1.0× axis with your curve.

Cyan line — the playhead, labelled with the current multiplier.

View Top and Fit View

The vertical range of the graph. Anything above it is pinned to the top edge, where you can neither see nor grab it. Fit View, the icon beside View Top, frames whichever is taller — your curve or the measured ramp.

Speed goes to 100×. The slider stops at 6 by feel, but you can drag or type straight past it.

Size and position

Width, Height, X and Y in the Display panel place the graph in the viewport. They are interface units rather than raw pixels — multiplied by Preferences → Interface → Resolution Scale — so one setting reads the same on a 1080p display and on a HiDPI one.

06

Timing

07

Presets

Eight shapes, named after how editors actually describe them.

Presets set the curve shape only. They leave Lock Duration, Speed and the interpolation mode alone, and they frame themselves in the view.

08

Points and handles

The Point panel always describes what the playhead is over — the frame, the multiplier there, and whether you are on a point or between two. Scrubbing makes the point under the playhead active.

Interpolation

Handle types