Mapping the FM26 UI Bundles – Could this help with custom skins?

Hey everyone! I’ve been exploring the FM26 files just out of curiosity, trying to understand how the game’s UI might be organized. I found a bunch of .bundle files under fm_Data/StreamingAssets/aa/StandaloneWindows64/ that seem to correspond to different interface layers — backgrounds, styles, icons, fonts, etc.

I’ve written down a rough breakdown below. Do you think this structure could be useful for anyone working on custom UI mods or skin replacements?

fm_Data/StreamingAssets/aa/StandaloneWindows64/


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A. Backgrounds and Styles (Critical for skins)

ui-backgrounds_assets_[1x-4x].bundle – Multi-resolution wallpapers

ui-prematch-backgrounds_assets_[1x-4x].bundle – Pre-match screens

ui-styles_assets_[1x-4x].bundle – Visual styles by resolution

ui-styles_assets_common.bundle – Common styles

ui-styles_assets_default.bundle – ⭐ Default style (primary target)

ui-styles_assets_match.bundle – Match interface



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B. Icons and Graphics

ui-icons_assets_[1x-4x].bundle – Scalable icons

ui-iconspriteatlases_assets_[1x-4x].bundle – Icon atlases

ui-textures_assets_all.bundle – General textures



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C. Fonts and Typography

ui-fonts_assets_production.bundle – Production fonts

ui-fonts_assets_[bundesliga|premierleague|uefa_*].bundle – Licensed fonts



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D. UI Components

ui-widgets_assets_all.bundle – UI widgets

ui-tiles_assets_all.bundle – Interface tiles

ui-bounds_assets_all.bundle – Boundaries and containers

ui-columns_assets_all.bundle – Column system

ui-charts_assets_all.bundle – Charts and statistics



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E. Data and Configuration

ui-panelids_assets_all.bundle – Panel IDs

ui-panelids-uxml_assets_all.bundle – UXML definitions (Unity UI)

ui-factoryxml_assets_all.bundle – Factory patterns

ui-preferences_assets_all.bundle – User preferences