[Quan Nguyen]

I’ve got the same problem. Reading some other posts on the net, some people identified that the problem is that the materials were set with 0% Opacity.
Adobe provides a script to fix inverse the opacity value (see https://kb2.adobe.com/cps/409/kb409030.html) but it only fixes some model and not all. The ones that I was able to fix is:

The Bugatti Veyron
https://sketchup.google.com/3dwarehouse/details?mid=1f9d9ebfb4e2c0dcb42f10fbe3d9a99f&prevstart=0

The Renault F1 car (but the result doesn’t look good)
https://sketchup.google.com/3dwarehouse/details?mid=4313633444c6171e9038dc2199a08729&prevstart=0

I am not able to fix this Ferrari f1 car
https://sketchup.google.com/3dwarehouse/details?mid=e38207549180beba2fc68f7262523f3f&ct=mdrm&prevstart=0

Can someone help?