I have a really weird Problem. When I compiling my map the compile log says I have a leak in my map. I already checked this on interloper.net, and it finds following Problems: Spoiler: Problem1 findportalside: couldn't find a good match for which brush to assign to a portal near (3072.0 2560.0 -96.0) Description: This error is usually followed by something like this: Leaf 0 contentsmay vary) Leaf 1 contents: CONTENTS_SOLID (may vary, e.g. CONTENTS_WATER) viscontents (node 0 contents ^ node 1 contents): CONTENTS_SOLID (ditto) This means that none of the brushes in leaf 0 or 1 that touches the portal has CONTENTS_SOLID Check for a huge brush enclosing the coordinates above that has contents CONTENTS_SOLID Candidate brush IDs: [none or more brushnumbers] Usually, this error is caused by a leak, so fix it if it is. If it isn't, there is a (group of) brush(es) that is/are giving vbsp.exe a hard time to figure out your level. Apparently it cannot determine the boundaries of a certain portal. Maybe there is a large brush covering the area, maybe the area is just to complicated for poor vbsp to figure out. I don't know the details but usually turning entities to world brushes or vice-versa helps to fight the problem. Hell, just cutting a brush in two once helped me fight this problem. Solution: Find the given coordinates (or if a brush number is given search for the brush number) and see what you can do to to simplify the area (like turning brushes to func_detail). You should also check to see if the brushes are overlapping at any point. Spoiler: Problem2 entity trigger_multiple (704.00 3248.00 48.00) leaked! Description: You have a leak. A leak is a hole in your map that exposes any entity in your map to the void (the black space outside your map). Solution: Fix the leak. Spoiler: Problem3 **** leaked **** Description: You have a leak. A leak is a hole in your map that exposes any entity in your map to the void (the black space outside your map). Solution: Fix the leak. When I go to the coordinates from Problem1 there is nothing, just the void. When I go to the leaked trigger multiple there is also nothing, as you can see in this picture: How can I solve this problem?