A much-needed guide to the ins and outs of physics model editing, using Anvil. Arranged in html format, it's clear and easy to navigate. Still missing a little bit of information, but if you're working with physics models, you definitely want to have this around.

If you've built complicated elevators (lifts, to those across the pond from us Americans), you've almost certainly run across a Marathon engine limitation which can make it impossible to use the action key to trigger the elevator control (punching or projectiles are all it recognizes). This happens because the active area for a switch comes at some fixed percentage of the floor-to-ceiling height, which may or may not correspond to where you've got a switch. HAS has released a quick demo map showing a rather elegant way around this problem. (If you don't understand my wording of the problem...

A standalone version of Bungie's Forge FAQ v2.0, for easy access. Includes the Forge Companion (available tools) and as a bonus, a promotional page.