If AlphaShadow is Off object still casts shadows

[coilbook]

Hi I am getting shadows from the objects that are invisible. I even unchecked cast shadows in object properties The only fix is to enable ALPHASHADOW but we do not use it because it slows down the renderer a lot.
Please fix when object is invisible and alphashadow is uncheck shadows will not appear Thank you

PS My object must appear so I have to animate visibility and cannot uncheck renderable object. But when visibility is 0 and Cast Shadows is unchecked I am still getting shadows

[stratified]

Hi I am getting shadows from the objects that are invisible. I even unchecked cast shadows in object properties The only fix is to enable ALPHASHADOW but we do not use it because it slows down the renderer a lot.
Please fix when object is invisible and alphashadow is uncheck shadows will not appear Thank you

PS My object must appear so I have to animate visibility and cannot uncheck renderable object. But when visibility is 0 and Cast Shadows is unchecked I am still getting shadows

This is not a bug, you have to enable alpha shadows. Enabling alpha shadows make sure we do all those extra checks along the shadow ray (object visibility, opacity, shadow visibility). These checks aren't for free so they slow down rendering. You cannot have your cake and eat it too.

cheers,
Thomas

[coilbook]

Hi I am getting shadows from the objects that are invisible. I even unchecked cast shadows in object properties The only fix is to enable ALPHASHADOW but we do not use it because it slows down the renderer a lot.
Please fix when object is invisible and alphashadow is uncheck shadows will not appear Thank you

PS My object must appear so I have to animate visibility and cannot uncheck renderable object. But when visibility is 0 and Cast Shadows is unchecked I am still getting shadows

This is not a bug, you have to enable alpha shadows. Enabling alpha shadows make sure we do all those extra checks along the shadow ray (object visibility, opacity, shadow visibility). These checks aren't for free so they slow down rendering. You cannot have your cake and eat it too.

cheers,
Thomas

Thank you Can future releases have Alpha Shadow PER object instead of a global setting. This will be such a help for animations. For example, we can have alphashadows for tree leaves disabled but have a nice transparency for a window, etc. For us every second we can save is important .

Thank you !