function loadNull(texture3D) {
  const context = texture3D._context;

  context._gl.texImage3D(
    texture3D._textureTarget,
    0,
    texture3D._internalFormat,
    texture3D._width,
    texture3D._height,
    texture3D._depth,
    0,
    texture3D._pixelFormat,
    PixelDatatype.toWebGLConstant(texture3D._pixelDatatype, context),
    null,
  );
}
Allocate a texture3D in GPU memory, without providing any image data.

@param {Texture3D} texture3D The texture3D to be initialized with null values.

@private