Documentation

Creating Roads

Roads are the foundation of your track. The Road tool lets you draw your track layout by placing control points.

Road Tool Controls

• Left click - Place a road point
• Right click point - Delete that point
• Click existing road - Add a point to that road
• Click existing point - Connect roads together

Connecting Roads

To connect two roads together, click on an existing road edge (not a point) while the Road tool is active. This will create a connection between the roads. When roads are connected, you'll see small drag markers at the connection point that allow you to control the width of the connection.

Drag these markers to adjust how wide the connection is, giving you control over how smoothly roads merge together. This is useful for creating realistic intersections, merge lanes, and track connections.

Creating Good Corners

When drawing corners in your track layout, it's important to use the right number of control points:

• Use enough control points - Place multiple points along a corner to give you good control over the curve shape. This allows the road to flow naturally through the turn.
• Don't use too many points - While having enough points is important, avoid placing too many points close together. Too many points can create wobbly or irregular curves and make the road harder to control.
• Never draw sharp corners with just 1 point - A single point at the apex of a sharp corner will create an unrealistic, angular turn. Always use at least 2-3 points for corners, placing them before, at, and after the corner apex to create a smooth, realistic racing line.

As a general rule, place points at key locations: entry, apex, and exit of the corner. For longer or more complex corners, add additional points as needed to maintain smooth curves.

Using the curve tool

The curve tool allows you to adjust the sharpness of corners in your track layout. After activating the tool:

• Click a road point - Select it for corner editing
• Scroll - Adjust the corner sharpness at that point

Road Properties

When the Road tool is active, you'll see controls in the Track Controls panel:

• Road Width - Adjust the width of your roads (5-30 meters)
• Road Edge Width - Width of the edge transition strip (helps match texture resolution)
• Road Texture Profile - Choose different road surface textures
• Road Tension - Controls how smooth roads curve between points (0 = sharp corners, 1 = very smooth curves). Lower values create tighter, more angular turns while higher values create flowing, gradual curves. Note: Road Tension only affects curves when Curve Type is set to Catmull-Rom.
• Curve Type - The spline interpolation method: Centripetal (default, balanced), Catmull-Rom (smooth, supports tension control), or Chordal (uniform spacing). Each produces slightly different corner characteristics

You can set different widths for individual roads by selecting them. Each road can have its own width settings.

Undo System

TreCorsa includes an undo system for road point placement:

• Ctrl+Z (or Cmd+Z on Mac) - Undo the last road point you added
• Undo Button - Click the undo button (↶) in the top toolbar next to the settings button

The undo system tracks up to 5 recent road point changes, allowing you to quickly revert mistakes while building your track layout. Note: Undo currently works for road points only - walls, kerbs, and other elements are not affected by undo.

Camber Tool

The Camber tool allows you to add banking (camber) to road corners. After activating the tool:

• Click a road point - Select it for camber editing
• Drag the control - Adjust the camber angle at that point

This is especially useful for creating banked corners and elevation changes.