Optimizer

Use gradient descent optimization to achieve precise roll, pitch, or yaw values.

Using the optimizer to automatically adjust banking for a perfect roll-to-zero turn

How It Works

The optimizer adjusts selected keyframe values to reach target orientations at specific track positions.

Process: Gradient descent algorithm iteratively modifies the keyframe value until the roll, pitch, or yaw at the playhead position matches your target.

Roll-to-Zero Example

Create a banked turn that returns to level track.

Setup the Turn

  1. Create a Geometric Section with 4 roll speed keyframes
  2. Lower the 2nd keyframe - banks track left
  3. Raise the 3rd keyframe - banks track back right
  4. Problem: Final roll rarely returns to exactly 0°

Optimize the Exit

  1. Position Playhead at the 4th keyframe (or beyond)
  2. Right-click the 3rd keyframe
  3. Optimize → Roll
  4. Target: Leave at 0° (default)
  5. Start - Optimizer adjusts the keyframe value

Result

The 3rd keyframe value automatically adjusts until the track roll at the playhead position reaches exactly 0°.

Optimization Targets

Target Use Case Example
Roll Banking control Level track exits, precise banking angles
Pitch Elevation control Specific hill heights, level sections
Yaw Direction control Exact turn angles, parallel sections

Usage Tips

Typically, optimization works best by creating 3 keyframes, placing the playhead at the final keyframe, and optimizing the middle keyframe.

Next: Advanced Techniques - Complete Circuits

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