Can´t adjust shadow settings in display mode

Hi my fellow Rhino users,
Maybe it is a dumb question, but i was trying to change the shadows settings, but unfortunately i can´t seem to change the settings. My shadows are always grainy and i wanted to do something about it, so i went into the settings, and as i said before, i just can´t change them. Is there any fix or am i just missing something? Or is it possible that i can´t adjust the settiings while using Cycles render?

Thank you all for the replies in advance!
image_2021-10-08_095119|514x499

The shadow settings you show in your screenshot are grayed out because they are not used for Raytraced/Rhino Render (Cycles).

If your shadows are grainy you can:

  • render more samples
  • try using a denoiser

Noisiness in the results will get less the more samples you render - the results need to converge, and it can take a lot of samples to get there.

Maybe you can post a render result of what you see, that might help in giving further information.