Feel free to copy this list's contents and share it as much as you want.

I'd really appreciate someone sharing their own resources or interesting features, so if you've got something of your own, list it here.

This guide is still under heavy construction and forever will be, add things of your own here. Any topic, any language, any program. The main important part is that you can apply it to SFM somehow, so no woodcarving tutorials (unless you really know it can be applied to SFM)

List of people, blogs and websites that can teach you.

• Steg - Amazing poster maker and tutorial creator, 8BEATER's main inspiration https://www.youtube.com/@steg3823/featured
  
  
• Jimmer Lins and his SFM "Tip of the Day" series with 80+ entires: https://www.youtube.com/@JimerXLins/videos
  
  
• The essential Valve Developer Wiki: https://developer.valvesoftware.com/wiki/Main_Page
  
  
• Steam Guides (browse them yourself for a while)
  
  
• Source Engine Discord resources list: https://docs.google.com/spreadsheets/d/17Iv35isJReaCiPXaUZHSxKopNU-PTAgx/edit#gid=369611561

Features or topics of SFM that entire posters, animation scenes or even projects can be based around.

• Alternative programs:
  
  • Source 2 Filmmaker, available currently in Half-Life: Alyx (doesn't require VR)
    
  • and Dota 2, also known as SFM Reborn
    
  • Interactive Filmmaker for creating Portal 2 projects
    
  • Blender [www.blender.org]now can accurately replicate the look of the Source Engine with all the maps and models, making the creation process much easier. Here's a list of resources which help imitate TF2 and other games' look (suggestions appreciated):
    
    • https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2138032803
• Physics Simulation
  
  • https://www.youtube.com/watch?v=tHfEP0UVkzQ
    
  • https://www.youtube.com/watch?v=PYR2eRmbbxo
• Recording Multiplayer TF2 Gameplay inside SFM https://developer.valvesoftware.com/wiki/SFM/Recording_multiplayer_gameplay
  
• Added by Thespikedballofdoom: "HLAE https://github.com/advancedfx/advancedfx
  tool you can use to record models in demos in source games and import them into SFM with https://github.com/advancedfx/afx-sfm-scripts "
  
  • "Also since recording in SFM with multiplayer requires port forwarding that most people don't have and hamachi kinda sucks, I have a guide on enabling connections to self-hosted games in TF2 that could be used in conjunction with those tools: " https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2805700840
    
  • "And if you want to do it in just SFM but can't port forward you could maybe check if your VPN supports port forwarding if you have one"
• Motion Capture isn't natively supported by SFM, however it's still possible. I haven't done research on it, but there are many ways to do it: a traditional mo-cap set with a suit, Xbox's Kinect, a normal camera. If someone knows more about this, please share it in the comments.
  
• Importing Miaxmo (website that hosts different animations compatible with many rigs) animations into Source https://www.youtube.com/watch?v=Z7sbYhatRwg
  
• Material Overrides https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2822139248

Features and tips which can be used for editing specific objects and can make a big impact on the scene, but not as important as high-level features

• How to simulate hair physics in Source Filmmaker https://www.youtube.com/watch?v=wX43_yhbTbE
  
• Uberlight technique https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2584336207
  
• Fake skyboxes using cubemaps https://www.youtube.com/watch?v=EopXAFnSduI
  
• Scrolling and animated textures
  
• Ambient Occlusion settings found on camera and those that can be applied to specific materials
  
• Every light setting https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2486515012&searchtext=All+light+settings

Features that won't entirely change the look of a scene but will simply improve your SFM experience, productivity or understanding. Knowledge you use every minute while working in this program.

• Amazing SFM Advanced Element Viewer tutorial. https://www.youtube.com/watch?v=1zNxG4M_EOc&list=PL3VOvhaRTDJN97THxdhpUtJUcci3WxN60&t=377s
  
• Recording movements in viewport in real time https://www.youtube.com/watch?v=0_6waNroZtE
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1776518541
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=716509115

Addons that can be used for all games

Plugins
• SFM Workshop Plugin Page. This page is full of very useful scripts made for the community, I'll just list a couple of those I found interesting.
  
  • Doc's Puppet Script (Importing animations from different characters) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=216464518&searchtext
    
  • Text Generator https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1110795170&searchtext=
    
  • More camera settings https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1408484674&searchtext=camera=

Models and textures

• Customizable gobo strips model which allows you to change the shape of your shadows https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=741818446&searchtext=Gobo