Selectors

Selectors are used to select Gaussian points in a model for deletion, cloning, separation, color grading, and other editing operations. The editor supports four selector types: Sphere, Box, Rectangle, and Mixed Lasso.

Selector toolbar

Selector Types

Sphere Selector

A sphere attaches to the cursor and selects model content within the sphere.

How to use: Click Sphere Selector in the toolbar, then hold the left mouse button and drag to select.

Radius: The default radius is 1.00. Use Ctrl + scroll to adjust it in increments of 0.01.

Sphere Selector operation

Box Selector

The Box Selector precisely selects a region in three-dimensional space.

How to use:

1. Click Box Selector in the toolbar.
2. Click once to set the first corner of the box base.
3. Click a second time to set the opposite corner and create the rectangular base.
4. Click a third time to set the height of the box.

After creating the box, use the panel to adjust it:

• Move: Move the selection box.
• Rotate: Rotate the selection box.
• Scale: Scale the selection box.
• Position / Rotation / Scale: Enter X, Y, and Z values.
• Depth Occlusion: Control depth occlusion for the selection box.
• Reset: Restore the initial state.
• Apply: Confirm the selection.
• Cancel: Cancel the current operation.

Box Selector operation

Rectangle Selector

The Rectangle Selector projects a region from the current camera view to select model content.

How to use: Click Rectangle Selector, hold the left mouse button and drag out a rectangle, then release to finish. You can also click the start point, move the cursor, and click the end point.

Rectangle Selector operation

Mixed Lasso Selector

The Mixed Lasso Selector projects a polygon drawn on the screen to select the scene. It supports straight-line and freehand lasso drawing.

Straight-line drawing:

1. Left-click to create the start point.
2. Continue clicking to add vertices.
3. Double-click to finish, or click the start point to close the polygon.

Lasso drawing: Hold the left mouse button and drag along the cursor path. Release the button to finish drawing.

Right-click to undo the previous point or cancel the current drawing.

Mixed Lasso Selector operation

Selection Operations and Shortcuts

Selection operations are available from the Select menu and the toolbar buttons.

You can also switch between add and subtract modes directly in the selector toolbar. Hold Shift or Ctrl to temporarily switch the current operation mode. The mode returns to its previous state when you release the key.

Depth Control (2D Selectors)

The Rectangle Selector and Mixed Lasso Selector support depth control. It limits how far the selection penetrates along the current viewing direction.

• The initial state is Global, which means there is no depth limit.
• Click Global to switch to limited-depth mode. The first fallback value is 50.00 m.
• Adjust the depth with the slider or value field in the depth panel.
• Click Reset to restore the default depth state.
• The depth hint area shows the current depth range.

A larger depth allows the selection to penetrate farther along the current viewing direction. Depth control affects only the Rectangle and Mixed Lasso Selectors. The Sphere and Box Selectors use their own radius or three-dimensional range.

View Control

When a selector is active, the camera is locked by default to prevent accidental scene rotation while you draw a selection. Use these temporary controls to adjust the view:

• Alt + left mouse button drag: Rotate the camera.
• Right-button drag: Pan the view.
• Mouse wheel: Zoom the view.

Tips