This is supposed to be a general guide.
- focus on the math, science and engineering that is common in all cases
- avoid diving into the specific ways each individual tool handles things
- make as few assumptions as possible and clearly document them
- open source developers tend to start from scratch in at least one area; this will help them solve their unique problems
- open source users are often left to puzzle through incomplete documentation; this will help them fill in the holes
- everyone who uses 3D printing will benefit from a common core; this will help them leverage 3D printing's strengths while avoiding its weaknesses
- a proper illustration needs little (or no) explanation
- pictures avoid using different words for the same thing
- diagrams usually don't require any translation
- it's easier to compare what you see on the screen to what you hold in your hand
- pictures can be shared and groked more easily