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Shadow's Is Odd

18 ANTWORTEN 18
GELÖST
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Nachricht 1 von 19
info
794 Aufrufe, 18 Antworten

Shadow's Is Odd

Hi,

I noticed something strange with my model.

 

I have a fence which goes to ground level (or meets the topo surface).

 

But the shadow cast by the fence looks as if sun light "shining" is under the fence.  

 

i.e. the shadow should start from where the fence reaches the ground??

 

Please see attached, 

18 ANTWORTEN 18
Nachricht 2 von 19
ToanDN
als Antwort auf: info

Model display> Lighting > Lighting in session > Set Ground Level to None.

Nachricht 3 von 19
info
als Antwort auf: ToanDN

Thanks Yeah I've done that, but most of shadows disappear.

I'm not sure what's happening (physically) when the ground level Reference is removed?

(See attached)

Nachricht 4 von 19
info
als Antwort auf: info

If I create a new lower level (below fence) - and set GRD Level to that. the shadow appears further away from the fence.

Which makes sense because there is a greater vertical distance between the (new) ground and fence. 

Nachricht 5 von 19
ToanDN
als Antwort auf: info

If your topography is at the correct Elevation then it should cast shadow properly when ground is set to none. You only need to set a level as ground when you don't have any physical ground surface.

Nachricht 6 von 19
barthbradley
als Antwort auf: info


@info wrote:

Hi,

I noticed something strange with my model.

 

I have a fence which goes to ground level (or meets the topo surface).

 

But the shadow cast by the fence looks as if sun light "shining" is under the fence.  

 

i.e. the shadow should start from where the fence reaches the ground??

 

Please see attached, 


 

 

Lower your View Range Bottom and View Depth.  

 

Shadow and VR1.pngShadow and VR2.png

Nachricht 7 von 19
barthbradley
als Antwort auf: info

Yah, I think it's all about View Range Settings - not so much about Sun Setting's Ground Level.

 

Here's some examples with no Ground Level:  

 

Shadow and VR3.png

 

Shadow and VR4.png

Shadow and VR5.png

 

 

Nachricht 8 von 19
barthbradley
als Antwort auf: info

Is that thick black linework a Wall Cap?  I get odd shadow casting when I model a wall cap too. Still, it's all correctable by adjusting View Range Settings.  

 

Shadow and VR7.png

 

 

Shadow and VR8.png

 

 

 

 

Nachricht 9 von 19
info
als Antwort auf: ToanDN

Yeah that's interesting, because if I delete the topo (all together)  - it does not effect that shadow - which I agree it should. 

 

Side note: this is how I set a topo surface;

 

The Topo's vertical position is only relative to the Floor Level, where I've moved the survey point the necessary distance below the floor level to produce  the correct RL - AHD (i.e. in this case is 27.16 meters above sea level or RL  Reduced Level -AHD - Australian Height Datum). And set the level markers base point to: Survey point.

 

The Topo is the last thing I move, because it's only has absolute levels - i.e. pegged to Internal Origin. 

 

Please let me know if that does not make sense.  It's a bit of a convoluted process aligning the site levels & topo - this way but it works for me. 

 

Nachricht 10 von 19
barthbradley
als Antwort auf: info

Just post your file. Avoid the guessing game. It's fun but grows old quick.   

 

 

Nachricht 11 von 19
info
als Antwort auf: barthbradley

Oh. that thick black line is not in the model I've added to the jpg so you can see the top of fence. 

Nachricht 12 von 19
barthbradley
als Antwort auf: info

Love to examine your file. I kind of bored of playing with hypotheticals that may or may not apply to your case.   

 

Hey! BTW @info, did you ever figure out that Associated Level issue you posted about on the Structure Forum?  That was pretty interesting.    

Nachricht 13 von 19
info
als Antwort auf: barthbradley

thanks, but I can't post it - it not my model. 

Nachricht 14 von 19
info
als Antwort auf: barthbradley

I've stiped it down to just the model, and shadow diagrams.

 

https://www.dropbox.com/s/dfwj3lh7buvtefq/revit%20dummy%20model.rvt?dl=0

Nachricht 15 von 19
info
als Antwort auf: info

let me know when you've downloaded it. 

Nachricht 16 von 19
barthbradley
als Antwort auf: info

I've downloaded it and removed the Graphic Overrides to the Toposurface and all is well. 

 

...get rid of the Transparency.  

Nachricht 17 von 19
barthbradley
als Antwort auf: info

Shadow11.png

 

Shadow22.png

Nachricht 18 von 19
info
als Antwort auf: info

ok. That other topic on associated levels & structural forum  - I'm not sure if that was me. 

Nachricht 19 von 19
info
als Antwort auf: barthbradley

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