What sort of customization options do you think Vieras and Hroths will have?

[Alien_Gamer]

I doubt the viera will have a butt slider or will have a larger base. To me what we're seeing is a combination of outfit and clever shaders making it look bigger but I could be wrong.

Viera ears will be selectable in the same way miqo/au ra tails are including length slider.
Hrothgar will have a muscle slider like roes/highlanders and claws will be attached to a subrace.
Both will have slightly different coloring and face options for each subrace.

I don't really see them having anything else based on how the current system works.

[Yshnal]

I doubt the viera will have a butt slider or will have a larger base. To me what we're seeing is a combination of outfit and clever shaders making it look bigger but I could be wrong.

Other than shaders and animations (see miqo'te standing animation making their butts look even worse), it can definitely be the gear that they're wearing. Some of the leg equipment, like the Spring Bottoms and the Scion Liberator's Pantalettes, makes you have an actual bigger butt (and some makes it even more flat, too, like the Sky Rat Breeches). You can notice that especially if you have a tail, as it's easier to see how the butt changes and makes the tail show more or less of its base.

In other words, expect 99% of the leg gear to make the Viera butts look as flat as everyone else's, because the size seems to be linked to the gear piece rather than the race.