Articles and Whitepapers written by WorldForge'rs

Lagrangian Mechanics Made Simple: A five part article that outlines Lagrangian Mechanics for the game coder by Ron Steinke

Part 1, Part 2, Part 3, Part 4 and Part 5
Acorn Internals: An explanation of the protocol conventions developed during the Acorn project by Al Riddoch. Essential reading for all developers.
Technologies for Building Open Source Massively Multiplayer Games: An article written by Al Riddoch and James Turner to accompany their presentation at the 2002 UK Unix Users Goup Linux Developers Conference.

Cal3d Media: how to export a model to cal3d format as used in WorldForge be the Sear client and the model2sprite tool.
Textures: what, why and how: Talks about the advantages and disadvantages of various methods of texure generation.
Creating face/head textures for human(oid) game characters: A tutorial for making head-textures using photographs.
And the light is on!: Revolves around the various types of lighting one can use in a scene and their impact upon the mood of the scene.
Image Composition: Learn the fundamentals of good image composition and how to compose interesting scenes from plain looking everyday objects.
Lights and Reflection Study: Puts everything learned in the previous three tutorials together to create a photo-realistic picture of some billard balls on a table.
2D Isometric Creature Animation: Learn the procedures necessary to create an isometric rendering of a creature (in this case a giant crab) to be used in isometric WF clients.
Tree and Plant modeling: Discover tools, tricks and techniques to creating vegetation suitable for photo realistic results and realtime 3D engines.

WorldForge Audio: DragonM discusses the reasoning behind choosing MOD (and/or one of it's derivatives) for the WorldForge audio format.
Persistent Data Storage for Stage: An analysis of design considerations for persistent data storage in Stage
Collision Detection: Collision Detection in Real Time Simulations of 3D Systems
Entity 3D Presentation and Structure: Entity 3D representation and structure from the server perspective.