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Load Textures

All textures used in this example are from ambientcg.

Three-dimensional (3D) textures are images that contain multiple layers of data, allowing them to represent volume or simulate three-dimensional structures. These textures are commonly used in 3D graphics and visual effects to enhance the realism and complexity of scenes and objects.

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There are two ways of loading 3D textures in TresJS:

Using useLoader

The useLoader composable allows you to pass any type of three.js loader and a URL to load the resource from. It returns a Promise with the loaded resource.

For a detailed explanation of how to use useLoader, check out the useLoader documentation.

ts
import { useLoader } from '@tresjs/core'
import { TextureLoader } from 'three'

const texture = useLoader(TextureLoader, '/Rock035_2K_Color.jpg')

Then you can pass the texture to a material:

html
<Suspense>
  <TresCanvas>
    <TresMesh>
      <TresSphereGeometry :args="[1,32,32]" />
      <TresMeshStandardMaterial :map="texture" />
    </TresMesh>
  </TresCanvas>
</Suspense>

Notice in the example above that we are using the Suspense component to wrap the TresCanvas component. This is because useLoader returns a Promise and we need to wait for it to resolve before rendering the scene.

Using useTexture

A more convenient way of loading textures is using the useTexture composable. It accepts both an array of URLs or a single object with the texture paths mapped.

To learn more about useTexture, check out the useTexture documentation.

ts
import { useTexture } from '@tresjs/core'

const pbrTexture = await useTexture({
  map: '/textures/black-rock/Rock035_2K_Displacement.jpg',
  displacementMap: '/textures/black-rock/Rock035_2K_Displacement.jpg',
  roughnessMap: '/textures/black-rock/Rock035_2K_Roughness.jpg',
  normalMap: '/textures/black-rock/Rock035_2K_NormalDX.jpg',
  aoMap: '/textures/black-rock/Rock035_2K_AmbientOcclusion.jpg',
  metalnessMap: '/textures/black-rock/myMetalnessTexture.jpg',
  matcap: '/textures/black-rock/myMatcapTexture.jpg',
  alphaMap: '/textures/black-rock/myAlphaMapTexture.jpg'
})

Similar to the previous example, we can pass all the textures to a material via props:

html
<Suspense>
  <TresCanvas>
    <TresMesh>
      <TresSphereGeometry :args="[1,32,32]" />
      <TresMeshStandardMaterial
        :map="pbrTexture.map"
        :displacementMap="pbrTexture.displacementMap"
        :roughnessMap="pbrTexture.roughnessMap"
        :normalMap="pbrTexture.normalMap"
        :aoMap="pbrTexture.ambientOcclusionMap"
      />
    </TresMesh>
  </TresCanvas>
</Suspense>