The best replacement for 4d is 3d.

The best alternatives to 4d are rated as following:
★★★★★  3d
★★★★  3d ultrasound
★★★  maya
★★★  filemaker
★★  3ds max
★★  toto
★  8d battery
★  filemaker pro
★  blender
★  3d studio max
★  4dx
★  modo
★  lightwave
★  revo speed
★  8d batteries
★  3d ultrasounds
  vix
  3ds max which is better
  3d carbon
  4r
  8d
  2d ultrasound
  adobe after effects
  max
  oss
  hl
  maya 2011
  speed revo
  3d max
  houdini
  3d scan
  maya 2013
  max 3d
  carrara
  3d sonogram
  xenith
  after effects

Your alternative for 4d is not listed? Suggest!
Speaking about 4d, one probably shouldn't forget about after effects.

Other search terms related to 4d and their ratings are:
★★★★★ after effects
★★ vray
You have in mind a companion for 4d and it is not yet here? Propose!



Google Trends

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4d
3d
3d ultrasound