Table Of Content: ArchViz UI3 Documentation 2026

New In UI3 Version 2026

The 2026 updates in a nutshell:

• Optimizing and clean up of blueprints to be better to understand
• Using data tables to input data to declutter the info map
• Using data tables for mesh and material choices to avoid having to enter the same data multiple times
• Engine Version 5.5 is the minimum version for this update to be able to make use newer engine features

Some data and settings have to be re-entered due to the use of data tables when updating from older UI3 versions

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 Layout And Design

User Interface Layout and Design. Settings that affect the Interface design

• Colors
• Text Format
• Panel Size

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

Edit mode can change materials or meshes of a scene object or display Information about an object.

Other widgets to change objects in the scene which have their own section are

• Designer
• Design Schemes and Scenarios (Feature with Preview)

Editing: Designer

The Designer shows object choice buttons in a table like widget.

• A quick way to change related objects
• For objects that are difficult to select
• For external blueprint tools like the Modular Kitchen Builder or the Interactive Doors Blueprint

Features With Preview

Features with Preview is a type of widget that has larger preview buttons to switch to another option.

• Design Schemes switch many objects to another design
• Variation Groups switch groups of objects
• Scenarios replace a sub level with another one
• Animation plays an unreal sequence
• Scene Travel loads another scene in the same project

Non-Editing Features And Settings

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

Scene and App Settings are driven by Settings Features and their sliders. The slider defaults are set when the app starts.

Game Modes, Controls, VR

This section covers

• UI Presets
• Game Modes including VR

as well as a short explanation of how controller and character work together to control the UI and the player movement.

Supporting Blueprints For UI3

Supporting blueprints that come with UI3.

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

Cost Tracking And Reports

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

How to print reports to a file with a free plugin.

Multi-Unit Projects (Part 1)

Setting up a multi unit project, like an appartement building. The project runs locally and uses datatables to store data defining the units.

It could be used in a showroom on site or in the real estate office.

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 as well as export of user choices to a Google sheet

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.

Some things are easy to fix if you do not want to wait for an update, or if you do not want to risk your work is being lost because of an update.

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