Yup or Zup ?

[Silverman]

The Z up assumes you are on a planet.

??????????????

Yeah, the starting point is the Cartesian plane, with x across and y up. If you maintain the orientation of looking at that plane then the only place to add the third dimension is to have it coming off the plane, which would be toward/away from the viewer (Yup). The Zup orientation also starts with the x-y Cartesian plane but rotates the plane as if being viewed at an angle, allowing Z to be up. My thinking is that the Zup orientation places the Cartesian plane on the ground, which implies a planet or some other orienting object. Yup does not, the only orienting object is the viewer, to my thinking that is more basic and universal.

[Kram1032]

It really depends on your PoV...
To me, Zup is more logic...
Perhaps, 'cause I looked down on the tiny details on the ground, in my very young ages?

[crc]

X,Y,Z ???? I have Red, Green, Blue

[Kram1032]

X RED
(in Zup:)
Y GREEN
Z BLUE

no idea, what's with Yup....

[dougal2]

colours are the same in Maya (Yup) Kram

[CTZn]

By the way you can set Maya to Z up...

[lycium]

For me, personally, Zup is the more logic way. You look down on a sheet of paper, so that x is left and right, where as y is farther away and closer to you. So, the next dimension to add is upward by using Zup.

Well if that's logic, what about the blackboard you learned maths on ? Was it on your knees :P ?

heh, this is also how i feel (you just take your normal highschool axes, and add a z axis perpendicular to them), and why all 3d software i write uses y-up :)