Perspective drawing lessons: learn the grid you're using.
Free perspective drawing lessons and software guides. Every diagram is a live grid you can drag, with the exact preset loaded, and every software guide ends with the no-software way to get the same grid.
Where to start
New to perspective drawing: read how to draw perspective first (horizon, eye level, vanishing points, the box), then which of 1-, 2- or 3-point perspective a scene needs. Ready for buildings and dramatic angles: 3-point perspective step by step. Curious why wide views bend: curvilinear perspective explained.
Perspective tools inside your app
The software guides answer the questions people actually search: where the tool is, how to use it, why it is greyed out and how to switch it off, for Photoshop, Illustrator, Clip Studio Paint, Affinity and Procreate. Each one ends with the no-software route: export a camera-accurate grid from the tools here and paste it in as a layer. The guide to perspective tools compares all of them in one place.