Is it possible to create a block with a 'mask' or 'wipeout', or whatever ACAD has, that is in the block so that when inserted, it blocks out whatever is behind it? I need to create a sprinkler symbol for a reflected ceiling plan (RCP), but my RCP has a lot of graphic hatching and needs to be blocked out wherever I insert this sprinkler block. Is this possible? If so, how?
WIPEOUT is a command, launch it and see. Use HELP if you get stuck.
"mask" means a lot of things to a lot of people, but in the old days before WIPEOUT command you created a SOLID (look up the command, it's 2D) or a DONUT (command name, not a breakfast item) with color 255 assigned to the object, slide it just behind the objects you want to see on top of it (DRAWORDER command), and place the combo anywhere you wanted with no fear of anything underneath being seen through it (DRAWORDER command again).
All the above can be combined into blocks.