by maylog·Workflow
Images © maylog. Used for product review; image policy.
MAT Helper earns its place in the Blender extensions library by automating the manual work of importing UModel textures and wiring them into a Principled BSDF setup.
MAT Helper is a specialized utility for technical artists and modders working with UModel (UE Viewer) exports in Blender. It automates texture importing and shader node setup, connecting raw .mat and .json data to Blender's Principled BSDF.
With one-click batch import, it reads .mat or .json configuration files and loads all referenced textures from a chosen directory. Node linking is handled automatically: diffuse maps connect to Base Color, metallic maps to Metallic, and normal maps generate a Normal Map node linked to the Normal slot. Specular maps run through an Invert node into the Roughness slot, matching common game engine workflows. Color space is set automatically, with sRGB for diffuse maps and Non-Color for normal, metallic, and specular maps for PBR accuracy.
Generated nodes carry their original filenames as labels and are arranged vertically for readability. You work from the MAT Helper tab in the Shader Editor sidebar, choosing a file and image folder, then clicking Read and Connect or Read Only. It is compatible with Blender 4.2 LTS and newer.
MAT Helper is best for technical artists and modders assembling PBR materials in Blender from UModel (UE Viewer) .mat and .json exports.
MAT Helper is completely free to download and use.
MAT Helper is compatible with Blender 4.2 LTS and newer, and is built for the current Blender Extension system and API. If you run a 4.2 LTS release or a later version, the add-on installs through the extensions workflow, either by dragging it into Blender or installing from disk. Older Blender versions are not listed as supported. For the specific release you are running and any compatibility notes, check the developer's GitHub page, which hosts the source and issue tracker for the project.
MAT Helper reads the textures referenced in your .mat or .json configuration files and loads them from a specified directory. Version 1.2.1 added parsing support for WebP, AVIF, and TIF texture formats, expanding the file types it can bring in. Diffuse, metallic, normal, and specular maps are each routed to the matching Principled BSDF slots as the nodes are created. For the full list of supported formats and any later additions, refer to the developer's GitHub page.
MAT Helper adds a tab to the Shader Editor sidebar, the N-panel. Open the Shader Editor, reveal the sidebar, and select the MAT Helper tab. From there you set the path to your .mat or .json file and the folder holding your texture images, then click Read and Connect to build a full shader setup or Read Only to import the nodes on their own. Keeping texture files and the .mat file in the same directory is recommended for automatic detection.
MAT Helper is listed as free in this catalog and is released under the GNU General Public License v3.0 or later. The add-on requires no special permissions in Blender. For the current licensing terms, source code, and any usage conditions, visit the developer's GitHub page, which hosts the project files and issue tracker. Licensing can change over time, so the developer's page is the best place to confirm the terms that apply to the version you download.
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