Use the Clip mode feature for all types of segmentation. With Clip mode, you'll be able to create instances without having them overlapped. You can use this feature with the Polygon tool only.
To use Clip mode:
- Select the Polygon tool.
- Enable Clip mode in the top panel or press Alt+C on the keyboard.
- Draw a Polygon that intersects with an existing Polygon.
Now both Polygons are intersected; meaning they share a border and aren’t overlapped.
When the new Polygon intersects with the existing Polygon, they share a border; they don’t overlap.
If the existing Polygon(s) divides the new Polygon into multiple pieces; then each piece will count as one instance but all the instances will be grouped under the same group ID.
If the existing Polygon is completely inside the new Polygon, then the area of the existing Polygon will be subtracted from the area of the new Polygon.
If the new Polygon you’re creating is completely inside the existing Polygon’s area, both Polygons will overlap.
If the existing Polygon has a hole and you draw a Polygon around it, then the new Polygon will fill the hole.
Updated 25 days ago