Creating Your First Effect

In this tutorial, you'll build a dynamic chase effect that moves across your fixtures.

Goal

Create a rainbow chase effect that:

• Cycles through colors
• Moves across fixtures in sequence
• Responds to BPM

Time: 15-20 minutes

Prerequisites

• A project with at least 4 fixtures patched
• Basic familiarity with the Node Editor

Step 1: Set Up Your Canvas

1. Open the Node Editor panel
2. If there are existing nodes, clear them or create a new layer
3. Right-click the canvas to open the node menu

Step 2: Add a Time Node

The Time node provides animated values:

1. Add Generator > Time node
2. This outputs a continuously increasing value based on BPM

Step 3: Create the Chase Pattern

We'll use the Fixture Index to offset the animation per fixture:

1. Add Input > Fixture Index node
2. Add Arithmetic > Add node
3. Connect Time output to first input of Add
4. Connect Fixture Index to second input of Add

This creates an offset pattern - each fixture is at a different point in the animation.

Step 4: Create the Color

Convert the animated value to a color:

1. Add Utility > Fract node (keeps only the decimal part)
2. Connect Add output to Fract input
3. Add Color > HSV to RGB node
4. Connect Fract output to Hue input
5. Set Saturation to 1.0 and Value to 1.0

Step 5: Output the Color

1. Add Output > Color Output node
2. Connect HSV to RGB output to Color Output

Step 6: Test the Effect

1. Press Space to play the timeline
2. Watch the Preview panel - you should see colors chasing across fixtures
3. Adjust the Time node's Speed parameter to change chase speed

Step 7: Fine-Tune

Adjust Chase Width

To make the chase smoother:

1. Add Arithmetic > Multiply after Add
2. Multiply by 0.25 to make each fixture span 1/4 of the color wheel
3. This creates a wider, smoother gradient

Add Dimming

To fade fixtures in and out:

1. Add Wave > Sine node
2. Connect the Fract output to its input
3. Use the sine output as the Value in HSV to RGB

Final Node Graph

Your completed graph should look like:

Time ──┐
       ├──► Add ──► Multiply ──► Fract ──► HSV to RGB ──► Color Output
Index ─┘                           │
                                   └──► Sine ──► (Value input)

Experimentation

Try these variations:

• Change the color range by offsetting the Hue
• Use different wave shapes for dimming
• Add a Threshold node for hard cuts instead of fades

Next Steps

• Add beat synchronization
• Learn more node types
• Build a complete show