What is a terrain deformation

I am going to use triggers that modify the z value of a unit and i was told that I cant have terrain deformations or it will desync. So my question is what specifically is a terrain deformation ie what JASS commands cause deformations as well as is cracks and such in the ground (like stomp) considered a terrain deformation?

Warstomp creates a terrain deformation. it is not the art of the cracks in the ground, but the modification of the terrain height, creating a small crater as the ability is used. Really, if you're not creating terrain deformations rather intently with triggers, or using warstomp and shockwave, then you're safe.

also, modifying a units z height is just changing its flying height. (add and remove the crowform ability, and you can chance a ground units flying height)

And finally, the problem with desyncs do not come from modifying a units height, but from the function GetLocationZ(myloc). If you do not use that function, then you are safe from terrain deformation desyncs.

- it's ubersplat + terrain deformation... btw ! how i know it cause only desyncs if some one runs war3 on low quality and the other one on high (or middle) so 1 will have deformation the other not. so GetLocationZ() will return different values for them = ta da ! DeSync if you is as a global data. but well for camera you can use it in any case ^^.

Couldn't you modify the spell to display on low quality then all the players will always see the spell?

Edit:

GAH BLEH!!! how do i remove the deformation from the spell stomp? I have a modified stomp spell that i will have to change and to rework it would take hours ;/

EDIT 2.0

yea.. i also use a modified shockwave...

Also I can find the video options anyone know where the options for modifying them are at?

Who runs a 5 year old game on low settings? :x

The "Model Detail Required" field is usually found in buffs only.