Three stencil-window examples reveal different object sets without a second camera texture. Includes editable materials, a saved demo prefab and an English PDF manual.A colorless mask writes a stencil channel, and matching content draws only inside its aperture. Create alternate-world windows using paired mask and content materials.Three separated windows show a few rings, steps and wire cubes on a plain background. Adjust the supplied components or materials in the Inspector. The saved scene uses a connected Simple Demo Setup prefab and includes an English PDF manual. Presentation labels and telemetry panels are not part of the demo.This is a stencil reveal, not a spatial portal camera or a recursive portal renderer. The mask writes no color or depth; plan surrounding walls, stencil IDs and render order explicitly. Included source attribution and license notices remain in the product folder.Reference project: Unity 6000.0.30f1 / URP 17.0.3. The current source-project Play Mode and continuous capture were checked on Windows / Direct3D 11; other platforms, XR and graphics APIs are not certified.Main controls: Portal Channel / _StencilID, Base Color, Accent Color, Pattern Scale, Emission and optional gallery animation.This is a stencil reveal, not a spatial portal camera or a recursive portal renderer. The mask writes no color or depth; plan surrounding walls, stencil IDs and render order explicitly.No measured production frame-rate guarantee. See the included English PDF manual for setup, runtime integration and limitations.AI was used during code refactoring and scene preparation.
