I'm still new to Bryce and have gone in circles for awhile on shadow behavior. Do I understand this correctly? See the attached pic.

Setup:
It is a solid cylinder with standard glass material. There is a yellow spotlight near the top, a small red-white pyramid toward the center and a thin cylinder (red opaque) at the bottom (within the glass) to receive the shadow.
Yellow spotlight is only light source

• sky is all black
• sun's color is black and disabled
• ambient is black

Left pic:
Sky Lab|Sun&Moon|Sun/moon shadows: off

Right pic:
Sky Lab|Sun&Moon|Sun/moon shadows: on

Although there is an on/off switch for each light source, the sun/moon shadow switch acts like the 'master' switch. Seems a bit nonintuitive...and undocumented.

Is this how it is supposed to work? Am I missing something?
thanks

Have you tried to switch off sunlight fully instead only the shadows i.e. disable sunlight? Could work. Take care, Jimi

From my understanding yes the sky lab takes precendence over the others and thus acts as the master.

On your pyramid object, in the mat lab, you can turn on or off the cast shadows for that object as well.

Aldaron is right. Unclicking the skylab shadowing option turns off all shadowing. I say this is a bug, although I'm sure others would argue.