Passing MTLTexture to SCNProgram with metal vertices and shader fragments

Question

I have an array of images, I have to select one image at random based on the vertex, with metal I can achieve this MTLTexture2DArray.

But I use SceneKit and Custom SCNProgram, and the problem with it is that I could not pass MTLTexture to the metal fragment function.

If I set the image to SCNMaterial, it works, if I set the metal texture, it throws an exception.

let material = SCNMaterial()
material.program = program
material.setValue(metalTexture, forKey: "customTexture")

The problem is exactly the same as in this question Passing Metal texture2d_array to the SceneKit shader modifier

but it uses a shader modifier, and here I use a custom shader.

Is it possible to pass an array of texture textures to a custom SCNProgram or is there another way to pass an array of images to shader functions in SCNProgram?

Answer 1

Wrapping a metal texture in an object SCNMaterialPropertywill work.

let imageProperty = SCNMaterialProperty(contents: metalTexture)
material.setValue(imageProperty, forKey: "customTexture")