CAD tip # 13150:

Question CAD
% platform category

How to hatch selected objects including overlays and islands?

The HATCH command in AutoCAD with the "Object Selection" option avoids by default any islands inside the selected hatched objects (uses the "every other" nested method) and any partially overlapping areas in the objects.

If you want to hatch selected boundaries "en mass" (selecting them by All, Window, etc.), regardless of any nested areas or boundary overlaps, select the "Ignore Island Detection" option in the Options pop-up panel (or in the Hatch dialog) when hatching (or the older "No Island Detection", HPISLANDDETECTIONMODE and HPISLANDDETECTION) and "Create separate hatches" (HPSEPARATE):

The "Create separate hatches" option will not show up in the preview and will create separate hatch objects for each area (in the overlapped area, the hatchure will be twice). Thus, you cannot create one common hatchure fully covering overlapping objects (without skipping their intersection). You can achieve this by using the internal pick point (not the object) selection method - this method creates its own auxiliary "outline" hatch boundary.

ACADACLTMapCivil

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1.12.2021 28357×

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applies to: AutoCAD · AutoCAD LT · AutoCAD Map 3D · Civil 3D ·

See also:
Tip 3960:	How to make voids (islands) in hatch areas?

Selected tip: Convert STL files to editable parts in Inventor.

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