Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the stylized_castle_generator zip.

Usage

1. Open the Castle tab in the 3D viewport sidebar (N). With nothing selected, click the picture to choose a design and press Add Stylized Castle, or use Shift+A, Mesh, Stylized Castle. The castle is built at the 3D cursor.
2. With a castle selected, the picture switches its design. Surprise makes a new random castle, Vary keeps the design and changes its proportions, Colors repaints it.
3. The main page holds Condition, Palette, Layout, Wall Stone, Size, Towers, Roof Covering, Keep, Gatehouse, Gate Open, Interior, Banners and Flags.
4. The sub-panels hold the rest: Walls & Towers (wall thickness, tower radius, roof curve, keep width, turrets, portcullis, windows), Details & Wear (ruin, grime, moss, wonkiness, seed, courtyard props, wall stair), All Colors and Castle Object (Reset to Design, Make Plain Mesh, Delete).
5. Switch Interior on to hollow the keep and towers and furnish them; leave it off for distant castles and lighter scenes.

The painted textures are bundled with the addon.