but for fun lets look at this static void CreateMaterial() theres only seven files, copy them to a Resources/Textures (make it if you have to) then just call them with: Sprite knob = Resources.Load('Textures/Knob.psd') as Sprite I just want to access the built-in sprites that are already packaged in the build. This is the current way I am already doing it. I do not want to use a prefab or public variable to do this which requires doing stuff manually first. How can one access these build-in sprites in a standalone build instead of the Editor? Tried typeof(Sprite) instead of typeof(UnityEngine.Object) but that failed too. UnityEngine.Object img = Resources.GetBuiltinResource(typeof(UnityEngine.Object), 'UI/Skin/InputFieldBackground.psd') I tried to use Resources.GetBuiltinResource for the build and standalone but it always returns null. Unfortunately, AssetDatabase.GetBuiltinExtraResource is from the UnityEditor namespace and will not work in a build or standalone program. In the Editor I was able to retrieve them with the GetBuiltinExtraResource function: Sprite img = ('UI/Skin/InputFieldBackground.psd') Private const string kMaskPath = 'UI/Skin/UIMask.psd' Private const string kDropdownArrowPath = 'UI/Skin/DropdownArrow.psd' Private const string kCheckmarkPath = 'UI/Skin/Checkmark.psd' Private const string kKnobPath = 'UI/Skin/Knob.psd' Private const string kInputFieldBackgroundPath = 'UI/Skin/InputFieldBackground.psd' Private const string kBackgroundSpritePath = 'UI/Skin/Background.psd'

private const string kStandardSpritePath = 'UI/Skin/UISprite.psd' I dug deep in the UI source code and found all their location declared in the MenuOptions.cs script. I want to access these through code.These include the UISprite, UIMask, Knob, Background and others as circled in the screenshot below. There are about 7 Sprites included in Unity that are used when you create a UI.

Unity ui source code