Yes. Use Prepare Export Copy and export the resulting meshes through Blender’s FBX or glTF exporter as appropriate for your pipeline. If you need the look of the procedural Blender materials in the engine, bake them to textures separately.

Yes. Parameters are saved on the structures in your .blend file. With the extension enabled, select a generated component and click Edit Selected Structure to recover its settings.

Yes. Choose Custom categories and assign your materials to the available slots. If you override materials directly on individual components, they can carry over when those components still match after regeneration.

Yes. Choose the individual generator from the Generator menu. The shrine and temple court presets are shortcuts for assembling multiple elements.

Yes. Select a component of that house and use Edit Selected Structure, then Regenerate Selected Structure. Regenerating the whole street replaces the individual house settings with those generated from the street preset and seed.

Assign a curve with one horizontal Bézier or Poly spline. Make it long enough for the house widths, roof overhangs, and gaps. For curved streets, soften tight bends or increase the gap to prevent roof overlap.

Go to the 3D Viewport, press N, and select Japanese District. If the tab is missing, check that Japanese District Builder is enabled in Blender Preferences.