question

Gaman Cheng avatar image
Gaman Cheng asked ·

Display incorrectly when Curvature is linked to Cutout Opacity

C4DtoA 3.3.5

C4D R21

-

I want to create a puddle with a soft edge. I think if I drive the opacity near the edge of the water, a hard intersection edge will disappear.

However, when I tried linking curvature node to cutout opacity, the puddle had a weird black edge without transparency. Is it a bug? or I did something wrong. I am sure opaque in Arnold tag was disabled.

-

And I inverted the curvature to see what would happen, it looked correct.

There are some screenshots that can be switched to see the difference, The third picture is two shaders mixed, it's the effect I want.

-

Here is C4D file:

https://drive.google.com/file/d/1dPcT8GjlrdneRHXz3tWBTuoiG_1L76E2/view?usp=sharing

01.jpg

02.jpg

03.jpg


bug reporting
01.jpg (435.5 KiB)
02.jpg (439.2 KiB)
03.jpg (440.9 KiB)
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Peter Horvath avatar image
Peter Horvath answered ·

Thanks, looks like a bug indeed. Forwarded the issue to the core devs.

1 comment
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Thank you, Peter!

0 Likes 0 ·
Peter Horvath avatar image
Peter Horvath answered ·

Could you please check if it renders correctly on the CPU?

10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Gaman Cheng avatar image
Gaman Cheng answered ·

Hi, Peter. It still renders incorrectly on the CPU. But looks better than GPU.

cpu-render.jpg


cpu-render.jpg (393.2 KiB)
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Welcome to the Arnold Answers community.

This is the place for Arnold renderer users everywhere to ask and answer rendering questions, and share knowledge about using Arnold, Arnold plugins, workflows and developing tools with Arnold.

If you are a new user to Arnold Answers, please first check out our FAQ and User Guide for more information.

When posting questions, please be sure to select the appropriate Space for your Arnold plugin and include the plugin version you are using.

Please include images, scene and log files whenever possible as this helps the community answer your questions.

Instructions for generating full verbosity log files are available for MtoA, MaxtoA, C4DtoA, HtoA, KtoA, and Kick.

If you are looking for Arnold Documentation and Support please visit the Arnold Support site.

To try Arnold please visit the Arnold Trial page.

Bottom No panel present for this section.