glTFast

glTFast is an awesome extension for the Unity engine. It helps you use GL Transmission Format (glTF) asset files easily. The developer claims it meets 100% of the glTF 2.0 specs, which is great news for both new and older projects! Plus, it works perfectly with Universal, High Definition, and Built-In Render Pipelines on all platforms.

Easy to Use in Unity

You can use this extension in a bunch of ways within Unity: editor export, editor import, runtime export, and runtime import or loading. What's cool is that you can tweak these features to fit your project’s needs. This means you can customize how files are downloaded, loaded, materials are generated, and even how data from the glTF scene is accessed. You can also manage loading reports easily!

Custom Shaders Matter

One important thing to note about glTFast is that it uses custom shaders. The developer strongly recommends including these shaders in your builds so that materials show up correctly. If you forget to include them—though everything looks good in the Unity Editor—you might find some shaders or their variants missing when you run your project.

Create Placeholder Materials

If you're worried about missing shaders, a smart workaround is to create placeholder materials for all the different feature combinations you plan to use. Just put these placeholders in the Resource folder of your project. That way, you'll be all set no matter what!

If you're ready to give it a shot or want more details on how this tool works, check out this link for download. You'll be glad you did!