Tomas Slancik

Jaeger
However I believe there is maybe smarter methods. What can we do so we don't lose any data from Maya ?

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carlitos1723
hello I have the impression that in houdini 20.5 I don't have the kelvin Wakes Deformer Houdini option

You need to install Sidefx Labs from the Launcher or SideFX Labs shelf

many VEX functions are overloaded, like rand() for example can return single float random number, vector2, vector etc..
Houdini can a lot of times infer this return type from the assignment and if not it will complain

in your case @N is one of the standard attributes and Houdini knows it's a vector even if you don;t specify it as v@N
and because @N is a vector, then Houdini will by default also use vector signature of rand() function in this line

meaning that each component of @N will be multiplied by a potentially different random number hence changing the normal's direction
on axis aligned grid it seemingly works since x and z components are 0 regardless

so to get what you want you can do this:
or maybe cleaner this: