Plot vector PDF with transparency


I am wondering if there is a way to plot hatches to pdfs with transparency? I can only get this to work with rasterized PDFs or saving as a PNG. Is this a limitation in the RhinoPDF “driver” or is there an option I’m missing?

I added two PDFs written with RhinoPDF for reference, the vevtor one is losing all Alpha Values on the Colors.

test_raster.pdf (90.1 KB)
test_vector.pdf (1.2 KB)

thanks in advance,