How to Sculpt a 3D Landscape Online

• Download the original GLB. In File, turn off Import as group and Center imported asset, then choose Import Files.
• Remove the default Cube and Camera; keep Key Light. Select Terrain_base, choose View → Top, then View → Frame Selected. Switch to Material Preview.

Sculpting moves existing vertices. This dense grid has enough points for hills; a four-corner plane does not.

• Switch to Sculpt Mode and choose Draw. Set Radius to 110, Strength to 0.065, and Falloff to Smooth. Turn X, Y, and Z symmetry off.
• Radius controls brush size; Strength controls how strongly each stroke moves the surface. These are starting values for this sample and view.

• Make several short passes in the back half of the tile to form broad hills. Build gradually instead of using one heavy stroke.
• Use Radius 100 and Strength 0.04 to connect them with a curved ridge. Overlap strokes and keep away from the rim.

• Reduce Radius to 60 and use Strength 0.08. Add a few small strokes for a main peak and a lower neighbor; leave an open valley in front.
• If a stroke goes too far, use Edit → Undo and try a lighter pass.
• Choose Smooth with Radius 85 and Strength 0.4. Soften rough shoulders, not the summits. Orbit to inspect the silhouette and tile edge.

• Return to Object Mode. In Material properties, set Base Color to white (#FFFFFF) and Roughness to 0.65. White prevents the material from tinting your paint.
• Return to Top view and Sculpt Mode, then choose Paint. Its Color control paints vertex colors—not height or an image texture.

Paint may require Pro when the free-access period ends.

• Set Color to #487457, Radius to 500, and Strength to 1. Use broad passes to cover the visible terrain in muted green.
• Keep symmetry off. The dense mesh lets neighboring vertex colors blend smoothly.

• Choose warm gray #807D73, Radius 105, and Strength 0.7. Brush the ridge and upper slopes, letting some green show through.
• Use off-white #F2EEE2 with Radius 34 and Strength 0.85 on the main summit. Try Radius 25 and Strength 0.7 on the lower peak. Keep both caps small, then orbit to inspect.

• Return to Object Mode with the terrain selected. In File → Export, choose GLB binary, Scope to Selected, and Include animations off, then Export.
• Use File → Save for the working project in this browser. Keep your original model and downloaded GLB as separate backups.
• Use File → New for a clean scene. Keep grouping and centering off, then import the exported GLB. Check the shape and colors in Material Preview.