Jump to content
the.dreamer

Renderworks : cyclorama light not shown

Recommended Posts

Hello everyone,

 

I have a rendering problem with Renderworks.

 

I created a cyclorama with the Soft Goods tool and created a special texture for it, to allow it to be lit from the back.

The texture settings are :

  • Color : White 100%
  • Reflectivity : None
  • Transparency : Plain 99%
  • Bump : None
  • Cast and receive shadows
  • Override Indirect Lighting, Emit Light and Receive Light checked.

 

With these settings it works well with OpenGL, but with all the RenderWorks (I tried Fast, Final and Custom with different settings) modes the scrim is just black.

And I can't only use OpenGL as I want to use more than 8 lighting instruments in my renderings.

 

Anyone ?

Share this post


Link to post

The key to it is the reflectivity shader. This should be set to Backlight. You may also want to add an additional surface that contains a see-through glow shader.  Light dissipates across a scrim and this is a good way to show it. 

I've included a file with an example. Scrim.vwx

 

If you want to just show a smoothly lit cyc, then a good and quick way would be to just have a glow shader applied to a Nurbs surface.

 

Share this post


Link to post

Thank you for the quick reply !

 

So, I tried with your file (by copy-pasting the group and exporting the texture) and… it's even stranger. It work well in your file, however in mine in OpenGL it's just black and in Renderworks it' gray.

If I set the intensity of the texture to 90%, I have something in OpenGL, but still nothing in Renderworks.

I attach two screenshots to show you how it renders.

 

Maybe there is a problem with the lighting instruments… ?

 

Your second solution isn't suitable for me as I want to use the lights behind the cyc.

Renderworks.png

OpenGL (Opacity 90%).png

Share this post


Link to post

I don't really understand what your two images are. Can you describe each one for me and what you are doing?

Share this post


Link to post

Oh sorry, I forgot to name them.

The first one (gray) is a Renderworks rendering with the group and texture of your file applied in my file.

The second one is an OpenGL rendering of the same thing but with the intensity of the texture set to 90% (if I keep the intensity to 10% like in your file, then in OpenGL it's black). It's the only case where there is something approaching my needs (where I see the light through the cyc in fact). But in Renderworks the cyc is white in this case.

Share this post


Link to post

Are you absolutely certain you are using the texture I sent over on your cyc surface?

 

Colour: Off white

Reflectivity - Backlight:

5a89971d11eb3_ScreenShot2018-02-18at15_08_50.thumb.png.5d51fdd311dcfd0c554abd9c7f226530.png

Transparency - Plain:

5a89978393df9_ScreenShot2018-02-18at15_09_49.thumb.png.f75e517aadac3eca7179fa09d6a55d6b.png

 

Works fine here. I've added a lighting device instead of using a standard light object.

 

Open GL:5a8997d91f8ef_ScreenShot2018-02-18at15_11_50.thumb.png.fa6c96004d24f1ba7e669b931bd4472c.png

 

Fast Renderworks:5a8997f65c050_ScreenShot2018-02-18at15_12_05.thumb.png.77704a9a2265ddf0258591a7f948af9d.png

 

Also check your lighting options:

 

5a8998a8f0e4a_ScreenShot2018-02-18at15_15_14.thumb.png.a248dbf9ea33f3c2a6915bfbffc2aeff.png

 

If you still have problems then PM your file and I can troubleshoot it for you.....

 

BTW, if you have your transparency set to none, and backlight on Open GL won't understand that whereas Renderworks will. Basically, not as much as one would like is enabled on OpenGL in Vectorworks.

 

 

Mark

Edited by markdd

Share this post


Link to post

Ok, so I worked a little bit more in my own file with the elements you sent me. Apparently it's the lighting instrument (ADB ACP1000) which has a problem, because with another one (tested with an ADB F101) it works well (like on your screenshot).

The odd thing is that in OpenGL the light is shown, but not in Renderworks.

Share this post


Link to post

Yes. The ADB fixtures don’t have a lens texture attached (or it’s incorrect) which is a fault with the Vectorworks symbols. You’ll need to edit the symbols then.......

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

 

7150 Riverwood Drive, Columbia, Maryland 21046, USA   |   Contact Us:   410-290-5114

 

© 2018 Vectorworks, Inc. All Rights Reserved. Vectorworks, Inc. is part of the Nemetschek Group.

×