I posted this over in the general discussion- but Nicholas suggested I try posting here- so ....
Illustrator file from client- with logos-
imported to Photoshop and saved as psd (checking that the background is transparent)
create imageprop in V11 (mac 10.3.4)
options: use mask, constant reflectivity, create plug-in, transparent color
color tolerance and mask contrast left at defaults
Viewed in final renderworks the background is still seen as light grey- which is a problem- because this needs to look like cut vinyl on glass.
My workaround has been making a lot of extruded polygons - but there must be a better way?
TIA
Ziska