Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: helloharuko on 2020-10-14, 20:29:20

Title: Stretched Corona Sky Reflections on chrome material
Post by: helloharuko on 2020-10-14, 20:29:20

Hey everyone,

I'm building some chrome canned items in Cinema 4D with Corona and I'm having issues with stretched Corona Sky (HDR) reflections. Please see the attached image.

I dropped in a sphere and Cylinder object to show that spherical objects do not have this issue.

Please help! Thank you :)

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: TomG on 2020-10-14, 22:56:01

What version of C4D, what version of Corona, and most importantly, how did you add the HDRI to the scene? It should be a Corona Sky with the HDRI added to it (it looks here that it may be something like the HDRI added with Frontal Projection or something else).

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: helloharuko on 2020-10-15, 01:39:19

Hello,

I'm using Cinema 4D R21 with Corona version 6.0

I loaded up this HDRI image using a Corona Sky object set to Shader/HDRI.
The projection is left at the Spherical default on the Corona Sky object.

The HDR came from https://hdrihaven.com/

Any help is appreciated. Thank you!

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: TomG on 2020-10-15, 04:34:37

You can always upload the scene for us to look at (see https://help.c4d.corona-renderer.com/support/solutions/articles/12000033461-how-to-report-issues-c4d ). Sounds like the HDRI is ok, so I'd look into phong and smoothing on the tin can next, e.g. does a regular C4D cylinder primitive render as expected? How was the tin can modeled?

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: Beanzvision on 2020-10-15, 11:27:41

Is that Corona chrome or C4D out of interest? Just did a quick test here and it seems to be ok.

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: helloharuko on 2020-10-15, 14:32:50

Quote from: TomG on 2020-10-15, 04:34:37

You can always upload the scene for us to look at (see https://help.c4d.corona-renderer.com/support/solutions/articles/12000033461-how-to-report-issues-c4d ). Sounds like the HDRI is ok, so I'd look into phong and smoothing on the tin can next, e.g. does a regular C4D cylinder primitive render as expected? How was the tin can modeled?

Hi there,

Thank you for helping, I really appreciate it! I attached a zipped working file.
The tin can was modeled using a cube as its base. Nothing crazy.

I tried playing around with the phong settings and nothing has changed.

Thanks again!

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: TomG on 2020-10-15, 14:41:55

It's the camera, you are using Parallel. Use a regular camera :)

Title: Re: Stretched Corona Sky Reflections on chrome material
Post by: Beanzvision on 2020-10-15, 15:08:33

And to get a similar look to that of the parallel camera, as Tom suggests, switch it to a perspective camera and increase the focal length to something like 250-300mm.