Documentation

Surface Tool

The Surface tool creates flat areas for parking lots, runoffs, or other flat areas. Unlike texture paint, which only changes the visual appearance of terrain, surfaces are actual physics meshes that affect driving characteristics. Different surface types have different physics properties:

• Pavement surface - Has standard road physics with normal grip and handling characteristics
• Sand surface - Has sand physics with more friction and less grip, making it more challenging to drive on

Surfaces are useful for creating paved areas around your track, pit lanes, sand traps, or any flat surfaces where you want distinct physics behavior from the terrain.

Surface Tool Controls

• Left click - Place a point, keep placing points in the shape you want, after 3 points it will start to fill the shape.
• Right click point - Delete that point

Snapping surfaces to roads

Surfaces can be snapped to road edges for precise alignment:

• Click on edge of road - The surface point will snap to that position on the road
• Order matters - The order in which you place surface control points is important for the shape
• Junction corners - If you want to connect a surface to 2 roads that form a junction, make sure to click the exact corner point between the 2 roads

Below some fast screenshots to make it more clear, will update this.

Surface Settings

When the Surface tool is active, a settings panel appears that lets you control how surfaces interact with terrain and their smoothness. Each surface can have its own settings, allowing you to create different surface types for different areas of your track.

Surface Presets

Quick presets are available for common surface types:

• Flat (Parking) - Very flat surface with minimal terrain influence. Perfect for parking lots and perfectly level areas
• Smooth (Runoff) - Smooth surface that follows terrain gently. Ideal for runoff areas that need to blend naturally with the landscape
• Natural (Gravel) - Follows terrain more closely with moderate smoothing. Good for gravel areas and natural surfaces
• Terrain (Sand) - Maximum terrain influence with minimal smoothing. Best for sand traps and surfaces that should closely match the underlying terrain

Smoothing Settings

Fine-tune how your surface is generated:

• Terrain Influence (0-1) - Controls how much the surface follows the underlying terrain. 0 = completely flat surface, 1 = follows terrain exactly. Lower values create flatter surfaces, higher values let the surface adapt to terrain elevation
• Smoothing Passes (0-20) - Number of smoothing iterations applied to the surface interior. More passes = smoother surface. Higher values create very smooth, even surfaces
• Blend Distance (5-100 meters) - How far from the surface edges the terrain blending occurs. Controls the transition zone where the surface blends with surrounding terrain
• Shoulder Points (0-20) - Controls terrain blending around surface edges. Higher values create smoother transitions between the surface and surrounding terrain
• Grid Resolution (1.0-10.0 meters) - The size of grid cells used for surface generation. Smaller values = higher resolution (more triangles, more detail). Larger values = lower resolution (fewer triangles, better performance)

Advanced Settings

• Boundary Smooth Passes (0-10) - Additional smoothing applied specifically to surface edges. Helps smooth jagged edges, especially useful for surfaces that aren't snapped to roads

Note: Settings apply instantly to closed surfaces (completed surfaces). When placing a new surface, the settings will apply once you complete the surface shape. Each surface can have its own unique settings, allowing you to create different surface types throughout your track.

Use Cases

• Parking lots - Create paved parking areas around your track
• Pit areas - Design pit service areas
• Runoff areas - Create paved runoff zones around corners
• Sand traps - Create sand surfaces for challenging off-track areas with reduced grip
• Paddock areas - Flat surfaces for team areas and facilities

Best Practices

• You can connect roads to surface edges - useful for creating intersections or merging lanes
• Keep surface shapes simple for better performance - avoid overly complex shapes with too many sharp corners
• Use surfaces strategically to define key areas of your track layout