Block sunlight leaking into building through 3D section cut

[Christiaan]

It would be good if we could block sunlight from leaking into a 3D section through the section cut.

See attached example. I want the sun at that angle because I want it to come through the rooflight, but it looks weird coming though the section cut as well.

[mattao]

Hi Christiaan

Nice view you've done.

I assume it's a design layer section viewport.

COuld you explain us how you've done it?

Is there a way to obtain such a view directly in a sheet Layer?

Thank you

Mat

[CipesDesign]

I don't think it looks weird at all. It's exactly what the sun would do, if the building were sliced like that... Additionally, how can you call that "leaking". You (yes you) sliced the building open...

Now, as to an easy and practical solution: try adjusting the time of day (or angle of sun) slightly to remove those areas of light you don't want to show...

[Christiaan]

Peter, this is a problem because this is not how light will behave when the building is built. I don't want to present the building how it would look if we actually cut through it. I want to show how the light will work when the building is built. Cutting through it is simply a drafting technique to see inside.

[Christiaan]

Thanks Mat, the view is simply a sheet layer viewport of a design layer section viewport in perspective projection.

[ray isaacs]

christiaan,

i've been wanting to try this for a long time, but never got around to it.

in section dialog box, under advanced properties, display, there is:

"cast shadows of objects removed by section"

i always assumed this would do what you are hoping. does it not?

ray

[Dave Donley]

Section Viewport->Advanced Properties->Cast Shadows of Objects Removed by Section is there to handle the situation you are asking for here. HTH

[ray isaacs]

well, i finally tried it...thanks, christiaan, for the impulse.

strangely, the "cast shadows..." option seems to be available for sht layer section viewports, and not for design layer ones. that distinction does not make sense to me.

anyway, i did a sht layer section and the shadows cast properly as christiaan had hoped. however, i can't see a way to define the viewing angle in the sht layer viewport. in the design layer you can rotate or use a camera. in the sht layer i'm stuck with the default, which is not a good choice. there must be a way to change this. does anybody know?

ray

[VincentCuclair]

however, i can't see a way to define the viewing angle in the sht layer viewport. in the design layer you can rotate or use a camera. in the sht layer i'm stuck with the default, which is not a good choice. there must be a way to change this. does anybody know?

ray

[ray isaacs]

thanks, vincent.

but, doesn't that apply only to design layer viewports?

the original problem here is that--as far as i can tell--the "cast shadows..." option is only available for sheet layer section viewports.

ray