Table Of Content: ArchViz UI3 Documentation 2026

New In Version January 2026

What is new in the update from January 2026? - This update is a clean up and optimization of the UI3.

A lot has changed over the years and some of the blueprints and workflows became a bit convoluted to keep it consistent with older versions. This update breaks compatibility with older versions.

Some settings will be lost if a project is updated from a version released before 2026.

You can keep using the older version for engine 5.3 and migrate it to a project made with a new engine version.

Any new features will now only be added to version 5.5 or later.

UI3 Quick Guide

Quick Guide for the Arch Viz UI3 User Interface available on FAB and the Unreal Marketplace.

Videos

A List of Quick Guide Videos available on YouTube.

Most videos are not made for the latest version of UI3. But they still can be useful for understanding how it works.

Getting Started With UI3

How to get started with the UI3 in your own project:

UI Design And Settings

User Interface Design and Settings

Variation And Object Info Actors

The Variation Actor is the link between the User Interface and the Assets in the scene, so they can be edited.

The Object Info displays information without editing.

Editing Scene Objects

Editing scene Objects or gathering Information

• Edit and Info Mode
• Designer
• Design Schemes and Scenarios

Editing: Designer

The Designer shows objects and their variations in a table like widget.

• Modify objects that are in multiple locations or difficult to select
• External blueprint tools like the Modular Kitchen Builder or the Interactive Doors

Non-Editing Features And Settings

All features and widgets that are not mentioned in the Editing section.

Scene and App Settings

Game Modes, Controls, VR

This section covers

• UI Presets
• Game Modes including VR

Supporting Blueprints For UI3

Supporting blueprints that come with UI3.

• Location actor
• Walkable mesh marker
• Cost group
• Layout Swap

Build In Cost Tracking

UI3 has build in Cost Tracking that gives the user an estimate of the cost of his choices in the scene.

Multi-Unit Projects

The Multi-Unit Project Example can be found in

Content / ArchVizUI_V3 / MUP / Levels

The main level is UI3_MultiUnit_P

This is written for the 2025 version of UI3!

Google Cloud And Sheets

Using Google Cloud and Google Sheets to store and receive data for multi-unit projects.

Useful for projects running on remote servers. Allows real- time updates from a spreadsheet in Google Sheets

Third party plug-ins are required for this to work

Frequently Asked Questions And Tips

Frequently Asked Questions

Known Bugs And How To Fix Them

Known Bugs in UI3 and possible solutions. This may require editing some blueprints or widgets.

UI3 Version History

Version History for ArchViz User Interface 3. Updates and new Features will now only be provided for Engine Version 5.5 or later

• Last Update for Engine Version 5.3 to 5.4 was 12/2025
• Last Update for Engine Version 5.0 to 5.2 or earlier was late 2025
• Last Update for Engine Version 4.26 or earlier was 04/2024