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The Water tool draws a water surface the same way Create geometry draws a shape. Pools, fountains, rivers, and shallows become water you can swim in. World water becomes quads in water.xml, the water layer of the whole map.

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Draw water

1

Pick a type

Click Water in the left dock or press 0. In the Water node, open Type.
Water node with the Type list open showing Water · pool, fountain, river, shallows, and world

The five water types in the Water node.

2

Choose a shape

Shape is Plane (drag a rectangle), Flat outline (click corners, then click the first point or press Enter), or Strip along a path (click the course, press Enter to finish). Choosing a strip with Water · pool or Water · fountain switches Type to river. Pointer in the transform bar sets what the pointer can land on while you draw.
3

Set the height and draw

Z level (m) is the height of the water surface. For a river, set River width (m) (0.1 to 500) and click from where the water comes to where it goes: each point takes its height from where you click. Backspace removes the last point.The dock switches to Edit geometry with the new surface selected. It is named after its type, for example “Water · pool 1”.
Structure tree with Water · pool 1 selected and Object · Plane parameters below

A pool drawn in the scene, listed in the tree as Water · pool 1.

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Water settings

Select the water faces and scroll to Material. Type keeps the water type. Water holds the settings for that type, and Game default resets them all to the game’s usual values.
Material Type set to Water · pool with Color, Murk, Ripple size, Ripple relief, Shine, Shine falloff, and Surface set to Drawing and swimming

Pool settings and the swimming surface.

  • Flow rotation (°) is the direction of the current on level water. A river drawn with the Water tool already flows from its first point to its last.
  • Wave direction (°) is disabled while Wave height is 0.
  • Changing Type away from water drops the water settings.

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Swimming

Collision > Surface is Drawing and swimming, Drawing only, or Swimming only (invisible). It does not apply to world water.

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Pool or world water

Use Water · pool inside a room. World water is one flat, level rectangle for the whole map, and the game does not draw it indoors: you could swim in it without seeing it. Draw world water in a structure, not in a prop.

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Troubleshooting

This blocks export. Make the faces horizontal, or change Type to Water · river.
This is a warning. Change Type to Water · pool for water inside a room.
This is a warning. Draw a smaller area, or fewer separate pieces.
Draw the water in several pieces.
World water drawn in a prop is skipped. Draw it in a structure instead.
Add corners to the flat outline so its edges do not cross.
For how to move, edit, and undo the surface after you draw it, see Geometry.