- See my answer above!
- I'm always adding more parts. As for new slopes, I'd probably add 45 degree slopes first.
- Trees is something I'm experimenting with and would like to add within the next few updates! Also terrain editing to go with it!
- Banked curves are coming with the next update! (0.6.0)
- No diagonal track parts are planned for now, but might come at a later point.
- Light sources won't be possible. See my other answers earlier!
Things like 45 degree slopes and banked curves would be great, but things like trees and a trees in editor I think yup would just ruin the Polytrack style and a select tool that allows you to move, delete and save as a custom object would be sooooo helpful and would reduce the time to make maps. Especially ones with things like trees or houses.