On Amitopia website you could read the article about "Scenery" program (Freda Fish's series): Scenery is just a small app for Amiga that is unknown but it shows what power Amiga had back in 1988. It could render beautifully generated landscapes! But for most of the people, VistaPro landscape generator was huge. Lightwave 3D, Cinema 4D, Real3D or Imagine3D are also applications that were released for Amiga that would never be achievable if Amiga were that underpowered as the PC scene claimed.
