Client with a Linux box cannot open my dwfx files.
I created a web page as follows: LINK
I created the image using transparent colors as you
can see in the web page using the sniping tool. (Win7)
I then changed the material and colors back to simple
steel and aluminum on all parts.
As you view the image you can see a green (clear)
part that is not showing up in the 3D DWFx.
What settings in Inventor, or commands in the
imbedded url will assist Freewheel displaying material
and colors as seen in Inventor.
I got the same result you did.
The Autodesk Freewheel code is fairly old. This is probably a defect. Since we are moving the direction of Autodesk 360 with its built-in viewers, I doubt Freewheel will get much attention. Sorry.