Textures are cached — the same THREE.DataTexture is returned for repeated calls
with the same name. This is safe because colormap textures are read-only.
Parameters
name: string
Built-in colormap name (e.g., "viridis", "green", "magenta")
Returns DataTexture|undefined
THREE.DataTexture, or undefined if name is not a built-in colormap
Get a built-in colormap texture by name.
Textures are cached — the same THREE.DataTexture is returned for repeated calls with the same name. This is safe because colormap textures are read-only.