Flat Kit is fully self-contained and does not depend on any external assets.
If you do not need demo scenes, example materials and models you may skip importing the Demos directory in the asset.

The easiest way to get started with the asset is to dig into the demo scenes.

For Built-In RP it may take a while for Unity to import the asset — this is normal. Under the hood, Unity needs to generate all shader variants that are used in the demo scenes. For URP it is virtually immediate.
For URP, it is important that you created the project in URP initially, as opposed to creating a Built-in RP project and ‘upgrading’ it to URP one.

On the 3D models side, it’s important that you decide whether you would like making normals ‘smooth’ or ‘sharp’ for your meshes in a 3D editor, as the result will be different in either case. If you import someone else’s models and can’t edit the object in 3D editor, at least try to calculate normals in Unity — in the import settings of the model. The shaders should work regardless, but sometimes the difference can be obvious, especially on objects with rounded corners.

NOTE. Our demos were created in Linear color space (a setting found in Edit ▶︎ Project Settings). We recommend switching to it if your project is in Gamma color space, although this is entirely optional.

Here’s a video showing how to import a Universal RP (URP) version of Flat Kit in a Universal RP project.

Below are the written instructions on how to import Flat Kit. You can watch the video above of follow the guide below.

  • Step 1. It’s advised that you imported Flat Kit from Unity Package Manager. Please make sure you have Unity v. 2020.3 LTS or later running. Go to Window ▶︎ Package Manager. On the top left find the My Assets drop down menu. You’ll find Flat Kit among your assets. Choose the version you’d like to import. Click Download, then Import.
    Flat Kit import instructions - Step 1

  • Step 2. Choose which version of Flat Kit to import. If your project is in URP - select [Render Pipeline] Universal (URP).unitypackage. If your project is in Built-In RP, choose [Render Pipeline] Built-In.unitypackage. Click Import. You can re-import any of the versions anytime. The latest imported version overwrites the previously installed one. If you don’t see this step, see the note below.
    Flat Kit import instructions - Step 2

  • Step 3. Once imported, go to Project tab ▶︎ Assets ▶︎ Flat Kit. You’ll find the Flat Kit unitypackage file of your preferred RP. Double-click it.
    Flat Kit import instructions - Step 3

  • Step 4. Pick what contents of Flat Kit would you like to get unpacked. Click Import. You can import anything at any time while working on your project.
    Flat Kit import instructions - Step 4

NOTE. If you don’t see step 2 while importing, or URP unitypackage is missing, try cleanig the Unity Package Manager cache and import / update Flat Kit after that. The cache files can be found here:
Mac OS: ~/Library/Unity/Asset Store-5.x (press Shift+Cmd+G in Finder and paste this path)
Windows: %APPDATA%\Unity\Asset Store-5.x (hidden folder)
Linux: ~/.local/share/unity3d/Asset Store-5.x
More info about the Unity cache can be found in the Unity community answers page here.

NOTE. If you are going to use the URP version of Flat Kit, it is highly advised that you created an originally URP project, NOT a URP project ‘upgraded’ from a Built-in RP one.

We included a Readme tool, which is a useful debugging helper. It does the following:

  • Shows the stats like Unity, Universal RP and Flat Kit’s versions;
  • Detects what RP the project belongs to (Universal RP or Built-In RP);
  • Checks for available updates;
  • Clears Flat Kit’s Package Manager cache, which can be useful in re-importing Flat Kit during troubleshooting;
  • Opens this documentation as well as redirects to Git where you can open a support ticket;
  • Copies debug info which is useful for in-depth troubleshooting.

The [Readme] file can be found in Project panel ▶︎ Assets folder ▶︎ Flat Kit folder ▶︎ [Readme].

Readme tool's interface

Readme tool’s interface

If you have any difficulties during the installation, or at any point while working with Flat Kit, please, contact us, we’ll be glad to help.