You can see inside, but not through.
Controls
Click + drag Move shape(s)
Click Select / deselect
Ctrl / β + Click Add to selection
Mouse wheel Rotate 5Β° (group rotates around centroid)
Drag corner Rotate the selection
Drag edge handle Stretch a single shape
Ctrl / β + C / V Copy & paste selection
Delete / β« Remove selected
Categories
Building Blocks line of sight
Unit Click to show its LOS cone
Terrain Decorative, no effect on LOS
Tips
Grid squares = 1β³ each
Edge distances appear while dragging
in / cm toggle Changes unit display for new shapes
π Lock Prevents accidental movement; select again to unlock
β² / βΌ Layer Adjusts draw order when shapes overlap