CS5 Extended:Importing 3D Models queries

Question

Hi,
I just spent some time having fun  playing with 3d in CS5 for the last 4 weeks.  The 3D does offer a new exciting aspect to PS however I have come across some issues while experimenting with importing models.
I'm a experienced PS user  but new to the world of 3D. I'm not ranting but if possible like a explanation on the following
1) I have been importing dae files from google 3D warehouse. Nearly all models I import have corrupted textures when rendered in PS.  It's as some textures on the models look like they are split apart into triangular pieces.
I have downloaded google sketchup 8 and created simple models and most of the time PS does recognise the textures and render with no issues. It seems however more complicated models do render with issues.
For example here is a great model
http://sketchup.google.com/3dwarehouse/details?mid=ddd6c2a51c25036c8a43cd65b179a1ff&prevst art=0
I load it into Sketchup 8 and export it in dae format.
This models renders with no errors but the red decals render as described above (corrupted).
Most models from other sites like 3Dvia I don't experience any issues
Are there any known issues with Sketchup exports or is this a PS issue?
2) I create a simple capsule shaped 3d model one in PS and one in Sketchup 8. I compare the texture mapping of both  models in PS and was amazed how different they are. (The one created in Sketchup i exported as a dae file).  When trying to map a texture precisely on the imported sketchup version it was near impossible especially the way maps around curved surfaces.
Why is this mapping different?  What is the correct termination when describing this mapping ?
Do 3d applications save models differently even in the same file format ( i.e dae)?
As a whole in my experience importing 3D models seems to to be hit and miss. Is this the way it is at this time?
Many Thanks
I have latest PS update
Spec: iMac I7 27" 8mg

Answer 1

This is the same skin that was created in photoshop after it was imported into a game.
The hair is crappy but was just a quick toss together so she was not bald and nekit.