Block bullets texture doesnt block bullets in hammer editor

Ok. Good luck then !

[Blocked Image: http://cdn.hark.com/images/000/006/085/6085/original.0]

Tie it to a func_detail?

Make sure to cover all sides of the brush with the Block Bullets tool texture.

keeping the brush as a world brush won't block bullets; it will also severely affect your visleaves as "blockbullets" texture does cut visleaves when applied to a regular world brush.

You need to turn your brush (fully textured in toolsblockbullets) into a func_brush and set the solidity to "always solid". Make sure the thickness of your brush is no less than 4 units otherwise the brush becomes spammable like any other thin brush/wall in Source engine. Ideally, it should be between 4 and 8 units depending on where you are placing it.

Lastly, a friendly advice without trying to sound like an elitist: it's great you're trying to learn and advance your skills and everyone encourages you to pursue more but frankly, most of your questions are easy searches that do not require a new thread on their own. Read as many tutorials as you can then search Google, mapcore, interlopers, Gamebanana, steamcommunity for similar past threads/topics and finally do a lot of trial/error experimentation in your editor. If after all these, you still can't find an answer, then resort to starting a new help thread.

Hope this helps and good luck in your endeavours.