I have compiled a bunch of threads, tutorials and videos that you might find useful. I have ordered individual links in their respective categories by relevancy and how much usefulness I find their information. Note some of this might be complex. I know Egan already made this but there are some useful things (in my eyes) that he didn't have in the thread particularly Idolon's and Fishbus' videos. Feel free to comment suggestions that you want me to put here. Overall:The Hows and Whys of Level Design - Sjoerd “Hourences” De Jong Development Process:Shoreleave [Playlist] - [UEAK] Crash Trenchfoot [Playlist] - [UEAK] Crash Glassworks [Playlist] - [UEAK] Crash [ARTICLE] Snowplow and the tricks we used to create the Largest map in TF2 - Fr0Z3nR Mangy's Frontier Essay - MangyCarface The Dev Process: Creating MVM Steep - Idolon The Dev Process: Creating KOTH Anthem - tyler ctf converge - Aaron ‘Psy’ Garcha TF2 Mapping Commentary - TF2Maps Winter 2015 72hr Contest Recap/ Timelapse [plr_split] - [UEAK] Crash PL-VanishingPoint by Kim Dahlgren devlog - plr_rush - MegapiemanPHD TF2 Mapping Commentary - TF2Maps 2014 Winter 72 Hour Contest Recap [pl_subzero] - [UEAK] Crash Devlog - koth_synthetic [Playlist] - MegapiemanPHD Level Design in TF2 (Part 2) - Uncuepa KotH_ Deathbagel - Learn How to Build Team Fortress 2 Maps Part 2 - ArraySeven [Article] 5CP, Competing Against Badlands - grazr From Scratch: Designing a Team Fortress Level - Bobby Ross Post Mortem: CTF_Eden - Jethro Jongeneel The Making of Arena_Watchtower - Joshua Shiflet Layout:[COLLAB] Class Expertise for Map Design - x6herbius [GUIDE] Scale and your map. - grazr [GUIDE] Balance, layout and your A/D map. - grazr [GUIDE] Asymmetrical Map Design Dynamics - Idolon [GUIDE] Objectives and Your Map - grazr Player Destruction Guide - Egan [Tutorial] Good Health and Ammo Pickup Placement - Radaka [GUIDE] Let's talk about Mann vs Machine. - tyler Use of Open Areas, "Calm Spots," and Other Mapping Advice - Nicky Optimization:Half-Life 2 Map Editing Optimization Guide - Ralph 'zombie@computer' van Hoorn [TIP] Leaks, Hints and Areaportals - spaceweasel Source SDK Tutorial - Optimizing - 3kliksphillip Logic:[Guide] Payload's Logic - Blade x64 Scream Fortress and you: A guide to all things spooky - Sandwhip Hammer:Timesaving: Hammer's shortcuts. - YM [GUIDE] Creating backups on compile - Idolon Instances and you - Idolon [GUIDE] Using Manifests to Make Your Life Better - tyler mapping collaboration - or using manifest and version control - fubarFX Detail:Angled Geometry in Source - Ian 'Idolon' Spadin Functional Lighting - Magnar Jenssen Hammer Guide: Stairs - Ian 'Idolon' Spadin [Article] Stairs and your map. - grazr [ARTICLE] Roofs, Skybox brushes and your map. - grazr [Tutorial] Eliminating Dark Rooms - grazr [Guide] Composition and you - Idolon [Guide]Displacements - Basic Construction (Part 1) - Freyja / Aly [Guide] Seamless 3D Skyboxes - Freyja / Aly [GUIDE] A Primer on Basic Structures - Idolon A small guide on hazard stripes which nobody asked for - Skylark Hammer Tips - Spiral ramps - Ian 'Idolon' Spadin Hammer Tutorial: Circular brushwork tunnel - Ian 'Idolon' Spadin [GUIDE] How To Make Dirt Roads - Corvatile NoderNaeta's mapping lessons - NoderNaeta Art Pass Contest Entries - contains entries for the Art Pass Contest Making A Team Fortress 2 Map Overlay Poster - Fishbus [Tutorial] Making a Poster Overlay - Nineaxis [Tutorial] How to Make a Brick/Rubble Pile - BigfootBeto Creating Modular Curved Structures with Zero Floating Point Precision Loss - iiboharz Zoos and Prefabs:Brushwork Library (WIP) - wareya Frontline Props Placeholders Library - BigfootBeto pl_tapline's "Tap-To-Push" mechanics - GuttyKreum [Prefab] Bumper Karts - ThiqzMod Testing & Feedback:[GUIDE] Uploading your Map, Using VBot, and Finding Feedback - Startacker! [Tutorial] How to Get Your Map Tested - Tarry H Sruman Interviews: Mapper Interview - Freyja - [UEAK] Crash Mapper Interviews - 01 Icarus (Hosted by Egan) Mapper Interviews - 02 Heyo (Hosted by Egan) Misc / General Tips:[GUIDE] How to Release Your Map - tyler How to watch OR Record a Demo TF2 - DJive Longest sightlines in maps - Skylark KotH travel times - Jeff Magnum [TIP] Ask yourself these questions before your next release - sevin [TIP] How to compress .bsp to .bz2 with 7zip - Fr0Z3nR How to install content packs or other custom content - Yrr (Tutorial) Decompiling maps with BSPsource - Berry How to use tf_generic_bomb - [UEAK]Crash [TIP] Taking Isometric Screenshots - phi Tidbits: Will continually update to to include more.