Drive & Simulation

Open Drive in the top bar to enter the dedicated lap controls. Circuit Builder previews a car following your driving line, with its speed and drift angle changing through the lap. Watch the lap play out in the 3D viewer, or scrub to any point on the circuit with the lap slider. Playback controls at the lower left include play, pause, and reverse direction. Open Drive settings → Overview above the canvas to check road-edge clearance before building. Drive is still marked beta. Choose Overhead or 3D view while watching, then choose Draw to return to editing.

Drive settings opens three tabs: Overview for the driving loop, driving line, and clearance; Cars for models and spacing; and Tuning for the line’s shape and motion. Switch between Overhead and 3D view above the canvas.

In 3D view, Drive settings → Overview → Lighting selects Day, Dusk, or Night for the sky and lighting while following a car in 3D. See 3D Viewer for camera controls and car lighting.

Drive is a planning preview. Real handling depends on your RC car, setup, and surface; use the line and clearance checks to refine the layout, then test the physical build.

Automatic Competition lines

On Competition circuits, placed clipping points, outer zones, and touch-and-go zones guide the drift path automatically. Choose Draw, then move or resize a zone to change the line. Drive holds the line through each zone and connects zones smoothly, adding manji where the connecting straight has room. Start and Finish lines do not set the car’s lateral path.

While zones guide the path, the panel shows Competition zones instead of point-editing controls. Saved custom points remain with the circuit but do not guide that run. If the zones cannot be connected, Drive shows a warning and falls back to the automatic line until you adjust them.

Editing the drift line

When Competition zones are not guiding the path, open Drive settings → Overview → Edit driving line to shape the path on the plan. Click the line to add a point, then drag the point along or across the road. The line stays within the road boundaries. Clearance warnings still show where the car’s body needs more room.

Select a point and use Remove point or Delete to remove it. Arrow keys move the selected point; hold Shift for a larger step. Undo and redo work for each edit, and Reset to automatic restores the generated line. Escape cancels a drag, or leaves editing when no drag is active. Press Done, then Play lap to watch the result.

Your points are saved with the circuit and follow their road pieces when those pieces move or resize. If a road is removed or falls outside the driving loop, Drive flags the unavailable points so you can remove or place them again. Tuning continues to shape the line between your points.

Tuning the line

The line’s shape is adjustable under Drive settings → Tuning, and every control solves it live as you move it — what you see while dragging is the real line, not a rough preview. Expand Straight-line weaving for manji controls and Motion for transition speed and speed variation.

• Apex position sets where the clip sits inside a corner; past halfway through the turn counts as a late apex.
• Clip tightness is how close to the edge of the lane the line aims, wherever the car has room to spare.
• Line smoothing controls how much distance the line takes to move across the circuit — higher spreads a transition over a longer stretch instead of chasing every wiggle in the corridor.
• Weave spacing is how far the car travels per flick, in car lengths, when it’s weaving down a straight.

Three more controls shape how the car carries angle rather than where the line goes: Weave angle (the weave’s drift angle relative to the angle held in corners), transition speed (a ceiling on how fast it can swap sides), and speed variation (how much it slows for tight corners — higher values make the speed changes more pronounced).

For automatic lines without custom points or Competition-zone guidance, sustained shallow bends can hold a slide instead of switching sides at fixed intervals. Drive uses a simplified motion estimate to choose those transitions. Weave spacing controls straight-line weaving; it does not force a switch at every spacing interval through a shallow bend. This remains a planning preview, not a calibrated prediction of your physical RC car.

Running more than one car

Open Drive settings → Cars. A run can hold up to six cars, added to the lineup one at a time. One car is Solo, two is Tandem, and three or more is a Train. The lead sets the line, and every car behind it follows at the Follow gap you set, measured in car lengths. Circuit Builder checks that gap for you — it flags when the lead and chase car’s footprints would actually make contact, so you find out from the panel instead of watching the run to see it happen.

Picking a car model

The car gallery lets you pick a real make and model for every car in the lineup, but it’s cosmetic. The clearance math behind every tight-spot check and every contact check still runs on your circuit’s RC scale, not on which model you chose. Changing the body style changes what you see on screen; it never changes whether a layout actually clears.