I'm intrigued by Drei's statement about PerspectiveCameras:
You can use the PerspectiveCamera to film contents into a RenderTarget,...
So I wanted to get it working to try it out.
Using their example as a base, I decided to try and render a PerspectiveCamera to a plane:
<Canvas>
// Just a pretty box to look at.
<mesh>
<boxBufferGeometry attach="geometry" args={[1, 1, 1]} />
<meshStandardMaterial attach="material" color="hotpink" />
</mesh>
// A non-default camera to look at my box.
<PerspectiveCamera position={[0, 0, 2]}>
{(texture) => (
// A plane to render my non-default camera's view to.
// Note: Its position is behind the camera, so I don't think I will run into infinite rendering.
<mesh position={[0, 0, 3]}>
<planeGeometry args={[2, 2]}/>
<meshBasicMaterial map={texture} />
</mesh>
)}
</PerspectiveCamera>
// Just some necessary and helpful components in my scene
<ambientLight intensity={0.3} color="#FFFFFF" />
<pointLight intensity={1.0} position={[10, 10, 10]} />
<OrbitControls />
</Canvas>
I expected to see a plane in my scene with a rendered texture of the box. However, I see no plane, only the box, and the default scene camera.
I don't fully understand this line in the documentation, so I suspect it may be what's tripping me up.
[the plane mesh] will be set invisible while the FBO renders to avoid issues where the meshes that receive the texture are interfering.
