"MultiSub" Shader and shader space

[dislexie666]

Hi,
I'm converting all maya shaders manualy to PRMAN shaders through Slim. I got the concept of Surface space but the object has so many different shaders on that I need to apply accordingly. My questions are two.

1. Can I specify 2 or more shader spaces in the same shader? and how?

2. Can I select some faces and attach my shader there or should I detach those faces to create different objects?

All these were easy tasks using mayaman... but now I got in the deep heh.... It sure worths the effort though..

Thank You in Advance

[deke-kincaid]

1. Can I specify 2 or more shader spaces in the same shader? and how?

Do you mean multiple UV's?

1. Can I select some faces and attach my shader there or should I detach those faces to create different objects?

Select the faces and apply them to shaders in maya. Then attach the shading group(yellow node above the shader in the hypershade) to a shader in Slim.

[dislexie666]

Hey Thanks,

Yes Multiple UVs.Just in the case of RederMan they call it Shader Space and that is what I used.

These Objects have already Maya UVs. But It didn't work when I attached the shader on it.
Now that you told me about this SG trick i hope everything will work fine. But still the textures didn't look good when I asigned MayaUV in the shader..
So I had to asign new PRMAN shader space for some objects and that worked just fine.
My problem is Cylindrical or Spherical shader space that does not seem covered ...

[deke-kincaid]

Not sure about multi-uv's because I never use them.

As for the Maya UV's not matching up with the objects in the scene. What you need to do is use an expression to link a maya uv space to prman so they match. Just make a dummy 2dplacement node in maya, then goto your "MayaUV" nodes and in the "ST Matrix 0" "ST Matrix 1" you should change them to expressions and put the expression [st0 place2dtextures] and [st1 place2dtextures). Replace place2dtextures with the name of the 2d placement node.

[dislexie666]

Thanks.
that is pretty much covered in the manual and it says so on the info button too.
I'm pretty sure I made the correct steps but there must be something I missing.
I've seen it working and I did it too.
Actualy I was trying to find under what circumstances that would NOT work.

I have to add that most of the nodes are duplicated networks and though the names change
I'm not so sure about the shaders .... do you think this might be it?

anyway thanks again.

[dislexie666]

Frustration......

It can't be THAT difficult to texture map a frikin spaceship wing now .. or is it???
I got it to work.... almost... all i get is tiling all over the wing... and some other flat parts behave the same... the funny thing is that the most complex part got mapped right away without a fuzz.