Twilight - Invisible but cast shadow?

Twilight - Invisible but cast shadow?

Postby Shanta » Wed Jun 12, 2019 4:23 pm

Does anyone know of a way to render a material so that it is absolutely clear but still casts a shadow? I am trying to do a light study of a whole house in a dollhouse view (looking down with roof and ceilings removed) so that I can see the light only from windows and doors. But, of course, all the light pours in from the missing roof. I need someway to block the light that the roof would, but not obscure my view of the interior. I'd like to use high quality renderers.
0
User avatar
Shanta 
 

Re: Twilight - Invisible but cast shadow?

Postby Box » Wed Jun 12, 2019 4:31 pm

How about using a section plane.
0
User avatar
Box 
 

Re: Twilight - Invisible but cast shadow?

Postby TIG » Wed Jun 12, 2019 4:34 pm

Use this.
TransparentDummy.skm
0
TIG
User avatar
TIG 
Global Moderator
 

Re: Twilight - Invisible but cast shadow?

Postby Shanta » Wed Jun 12, 2019 4:42 pm

Box wrote:How about using a section plane.


Nope, light enters through the section.
0
User avatar
Shanta 
 

Re: Twilight - Invisible but cast shadow?

Postby Shanta » Wed Jun 12, 2019 5:18 pm

TIG wrote:Use this.
TransparentDummy.skm

This works great in SU, but Twilight does not render the shadow. Thanks, though.
0
User avatar
Shanta 
 

Re: Twilight - Invisible but cast shadow?

Postby TIG » Wed Jun 12, 2019 5:45 pm

Have you tried adjusting the equivalent Twilight Material ?
0
TIG
User avatar
TIG 
Global Moderator
 

Re: Twilight - Invisible but cast shadow?

Postby baz » Thu Jun 13, 2019 2:52 am

Possibly render with the 'Sun' off. And use emitters in the doors and windows. (In Twilight anyway).
0
I am both an early bird and a night owl, I am some form of permanently energized dragon.
User avatar
baz 
 

Re: Twilight - Invisible but cast shadow?

Postby TIG » Thu Jun 13, 2019 1:02 pm

The way the material works in SketchUp is that its texture is a 100% transparent PNG texture, but the material is set to be 100% opaque: that way you can see through it but it casts a shadow.
The equivalent Twilight material that gets substituted needs the same setup...
1
TIG
User avatar
TIG 
Global Moderator
 

Re: Twilight - Invisible but cast shadow?

Postby Shanta » Fri Jun 14, 2019 3:31 pm

I guess I'm still missing something. I've tried with the alpha at 0% and 100%, neither produces a shadow in Twilight. The template is "flat", should I start with something else? Advanced pane has Casts Shadows and Blended Clip turned on. Any help appreciated.
Screen Shot 2019-06-14 at 10.26.18 AM.png
0
User avatar
Shanta 
 

Re: Twilight - Invisible but cast shadow?

Postby tuna1957 » Fri Jun 14, 2019 4:27 pm

Follow the link... it might be of help. Really suggest posting your question on the Twilight Forum. If it's doable Chris or Fletch should know.https://www.twilightrender.com/phpBB3/v ... 107#p24290
0

tuna1957 
Premium Member
Premium Member
 

SketchUcation One-Liner Adverts

by Ad Machine » 5 minutes ago



Ad Machine 
Robot
 



 

Return to Extensions & Applications Discussions

Who is online

Users browsing this forum: No registered users and 0 guests

Visit our sponsors: