Light scattering / diffusion for southern window

[dakotablue]

Hi All! Curious if anyone has recommendations for how to increase light diffusion from a window. This is for my southern facing windowsill growing area. I know that some greenhouses have special materials that help scatter and diffuse incoming sunlight.

The goal is to have more evenly spread out light, to maximize the growing area. I'm in Berkeley and this window gets direct sun in winter from late morning until late evening. In summer, however, I only get direct sunlight on the bottom half of the window. I was hoping that if I could diffuse the light that I wouldn't have to have all the orchids smashed right up against the glass.

Any input would be greatly appreciated.

Thanks!
Dakota