A simple FakeForest Component for React Three Fiber by Anderson Mancini

Forest.jsx

/* 
Copyright(c) June 2024 Anderson Mancini

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import { useFrame, useThree } from '@react-three/fiber'
import { useMemo, useRef } from 'react'
import { Instance, Instances, useTexture } from '@react-three/drei'
import * as THREE from 'three'

export default function Forest({
  numTrees,
  innerRadius,
  outerRadius,
  position,
}) {
  const { camera } = useThree()

  const ref = useRef()

  const particles = useMemo(() => {
    return Array.from({ length: numTrees }, (_, index) => {
      const angle = (index / numTrees) * Math.PI * 2
      const radius = innerRadius + Math.random() * (outerRadius - innerRadius)
      const x = radius * Math.cos(angle)
      const z = radius * Math.sin(angle)
      const y = 0
      const scale =
        2 + Math.random() * 3.5 * Math.random() * Math.random() * 2.5
      return { x, y, z, scale }
    })
  }, [numTrees, innerRadius, outerRadius])

  const texture = useTexture('/fake_forest.webp')
  texture.flipY = false

  useFrame(() => {
    if (ref.current) {
      ref.current.children.forEach((child) => {
        if (child) {
          child.lookAt(camera.position)
          child.needsUpdate = true
        }
      })
    }
  })

  return (
    <group position={position}>
      <Instances
        castShadow
        receiveShadow
        ref={ref}
        limit={2000}
        frustumCulled={false}
        renderOrder={2}
      >
        <planeGeometry args={[4, 4]} />
        <meshBasicMaterial
          map={texture}
          color={0xffff00}
          transparent
          side={THREE.DoubleSide}
          depthWrite={true}
          alphaTest={0.2}
        />
        {particles.map((data, i) => (
          <Instance
            key={i}
            position={[data.x, data.y, data.z]}
            scale={[data.scale, data.scale, 1]}
          />
        ))}
      </Instances>
    </group>
  )
}

const texture = useTexture('/fake_forest.webp')

where can I get this texture?

Hi there! this texture is just a PNG of a tree. I can't give you the one that I'm using in that project but you can use any PNG texture and it will work, okay? You can even create multiple instances of this Forest component and use different textures, passing the texture name as a Prop. That would give you more variations!

I hope it helps!