Tutorials

Playing OpenTTD and TTDPatch

• PreSignalsTutorial: How to use pre-signals

Coding NewGRFs for OpenTTD and TTDPatch

• NFO Tutorial: How to make NewGRFs using NFO (incomplete)
• NML Tutorial: How to make NewGRFs using the NewGRF Meta Language (NML)
• Station Tutorial: Complete tutorial on station coding from scratch in NFO.

General sprite drawing

• GraphicsTutorial: How to draw new 8bpp graphics sprites
• Using 3dsmax: Creating sprites using 3DSMax (aimed at Locomotion currently)