[Stiglr]

Easy.

Use materials. The default #8 is ideal for this, as it's already a light blue. Or use one of the light grays #14 & 15 come to mind. some armored glass can have a yellowish or green hue, so maybe choose something like that...

1) Select the canopy in object mode.
2) In the bottom left interface, find the material (color) picker, pick a material, and assign it to the canopy.
Right click the material number "swatch".
On the pop up menu, move the transparency slider to the right, well into the 90% range.

The material will become nearly completely see through.