How produce this sweet blow, pixel spreading, smear effect in AE

[Michael White]

Scale Wipe Transition in After Effects

[Mike Clasby]

In AE 6.5, Transition>CC Scale Wipe

Or

Smear in Pete’s Plugins (freebie, AE5 to 6.5)

https://www.petewarden.com/index.htm

They are slightly different.

[Magicsamy]

All right thnks everybody !
that ‘ll do the job.

[Greg Neumayer]

Keylight seems to have something similar as well as a side effect of the outside matte adjustments (by choosing “repeat edge pixels”)

Antifreeze Design
https://www.antifreezemotiongraphics.com