question

Theo Van Oostrom avatar image
Theo Van Oostrom asked ·

Vertical lines appear in image while using a vector displacement map

Hi, I am getting vertical lines appearing in my reflections while using a vector displacement map on the water plane - I was guided by the Arnold tutorial. The water has an Arnold Properties Modifier with a vector displacement map. I have gone through and adjusted each setting but can not get rid of the vertical lines. My iterations are set to 8 but higher or lower values makes no difference. If I use another hdr image I get the same result - mainly in the bright areas. Please advise, thank you.

render
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.

Michiel Van Gasse avatar image
Michiel Van Gasse answered ·

Here are the setting if you want to use the environment slot.

Set custom resolution to the resolution of your Hdri or a decent value to speed it up.

Also a Camera (aa) of 10 is to high, unless using dof or volumetrics.

Usually 3 - 6 would be good.


2.jpg (107.6 KiB)
Share
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.

Theo Van Oostrom avatar image
Theo Van Oostrom answered ·

Thank you! That worked well.

Share
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.

Theo Van Oostrom avatar image
Theo Van Oostrom answered ·

I added a large hdri 15000 x 7500 and still no improvement. Not sure how to use the skydome - there is no place to add the hdri image. When adding an hdri to the environment slot it is supposed to add a skydome automatically - but not sure how to adjust it. I have added my scene file.city-arnold02a.zip


Share
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.

Michiel Van Gasse avatar image
Michiel Van Gasse answered ·

Probably a to low resolution hdri, or wrong mapping of it.

Make it environment mapping and use a higher resolution hdri.

You could set the resolution higher if using the skydome.

Share
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.

Theo Van Oostrom avatar image
Theo Van Oostrom answered ·

Yes, I have analyzed the scene in the tutorial - but this problem doesn't seem to show up, possibly because it is a close-up view of choppy sea waves and this is a more distant shot. I like how it does the horizontal lines, just need to get rid of the vertical ones. It is late here now so I will post a scene in the morning. Thanks.

Share
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.

Lee Griggs avatar image
Lee Griggs answered ·

There is now a scene file attached to the ocean tutorial. There is also a workflow example at the bottom of the page. If that doesn't help, can you post your scene?

Share
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.