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Messages - houska

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Hi all,

we are releasing a daily build of the new version of Corona Renderer. Namely Corona Renderer 6 for Cinema 4D. This build contains a few fixes as well as some changes from the Corona rendering core. The core changes will be added in the following days to the changelog, but in the meantime, you can merilly test the new build.

Do note, however, that we removed the Corona Standalone from the early builds of Corona v6 for now, due to technical reasons. We will add it back before the final release, so stay tuned!

Download link:


Changes in Corona Renderer 6 for Cinema 4D (Daily Build 2020-02-27) (

Edit: Updated with changes and fixes that were included with the switch to the new Corona rendering core.

  • Fixed:
    • Fixed crash in IR, when rendering with soft selection
    • Fixed rendering of projector shader
    • Fixed occasional freezes when dragging connections in material node system
    • Fixed blurring of caustics at the edge of the screen
    • Fixed issue where light mix/postprocessing settings in VFB where not accepting values if mouse was outside of the VFB window
  • Added:
    • Introduced a new way to activate corona - you can set your email & password or a path to the licensing server to environment variable CORONA_ACTIVATION:
      • For email and password, use format “email:password”
      • For licensing server address, use format “LS:address”
    • Added render stamp token %ptg which is replaced with the scene geometry preprocessing time (in milliseconds).
  • Changed
    • Temporarily removed Corona Standalone from the installer. We're currently doing a full rewrite of the Standalone code and it will be much faster if we don't need to maintain full backwards compatibility in every step during the development. The new version of standalone will be ready for v6 release.

There's just one little trick (took me some time to figure it out) - in order to "bake" the state of your hair into the model, you have to use "Simulate" -> "Hair Edit" -> "Set as Dynamics", otherwise the hair might get reset when you change the timeframe

Hi johnny!

Try the C4D hair tools:

[C4D] I need help! / Re: Sun problems!! not work
« on: 2020-02-21, 09:39:03 »
So now it happens for all versions? This could really be some activation problem. Can you please try to do the Solution A in this link?

[C4D] I need help! / Re: Sun problems!! not work
« on: 2020-02-21, 09:24:54 »
Ok, it sometimes happens that Corona fails to license correctly and then some issues could be appearing. Could you please try the "Solution A" as described here?

It's a helpdesk page for Corona for 3DSMax, but it applies the same for Corona for C4D...

[C4D] I need help! / Re: Sun problems!! not work
« on: 2020-02-21, 09:12:49 »
So if you try to install older Corona versions, it works fine with them?

[C4D] I need help! / Re: Sun problems!! not work
« on: 2020-02-21, 09:07:27 »
Hello alexrvs! This is really strange.

What version of Corona are you using? Could you also post a screenshot of your render settings?

You have to play with the phong mode in the Connect object. Otherwise it will create a phong tag for you, which you don't want in this case...

@houska: How could I fix the mesh in the first place?

I'm afraid I cannot help here. This is a matter of correct setup in your exporter and you mention Rhino or Archicad. I have zero experience in any of those two.

Your mesh is not connected. This is the issue of how it was exported.

You have two options:
  • Fix the export
  • Repair the mesh afterwards

I was able to fix your model by first merging all the relevant mesh parts together using Mesh -> Conversion -> Connect Objects and then by welding the vertices using the Connect modifier (see the attached image). I also had to delete the phong tags, which were incorrect for some reason. The displacement size of 2cm was also a bit too high, I think, so I lowered it to 0.5cm.

[C4D] Bug Reporting / Re: IR crash in Corona 5 hotfix2
« on: 2020-02-12, 18:43:45 »
Hello cychun and thanks for reporting this issue!

From the bugreport.txt it seems like you were removing a material, is that right?

Now, in order for us to be able to fix this problem, we must be able to reproduce it and for that we need to know the exact steps that you took that made C4D crash. If you are able to make C4D crash again in a simple scene, then great! If you can make it crash in your scene and if you can send us your scene through our private uploader, that would be great as well.

Unfortunatelly, I'm not sure we can do much if we are unable to make that crash happen again. But a description of what you were doing will be great in any case!

[C4D] General Discussion / Re: Layered material
« on: 2020-02-12, 18:30:01 »
This picture should answer your question about scattering the trees. As for conforming to the surface, I don't know how to do that. Try some C4D tutorials ;-)

[C4D] General Discussion / Re: Layered material
« on: 2020-02-12, 15:41:55 »
You mean something like this? Look at the attached .c4d file...

[C4D] General Discussion / Re: Layered material
« on: 2020-02-12, 15:34:48 »
Ah, sorry. I make this mistake a lot :-D Here's the attachment...

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