question

Harris Majeed avatar image
Harris Majeed asked ·

How do you add surface imperfections?

How do you add surface imperfections like smudges or scratches onto a standard_surface? In my case, I'm trying to add scratches to a shiny metal surface.

texturestandard surface
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 ·

Are you using the scratches osl shader? If so, there is an example at the bottom here.

Otherwise, it's output -> specular_roughness

3 comments 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.

If I do that, the metal will not have many specular highlights and won't look shiny. How do I preserve the roughness value so that the metal is shiny while also adding scratches using an image? I would not want to use a separate gloss map.

0 Likes 0 · ·

You can connect the file texture to a range or color_correct shader to control the results in the specular_roughness.

0 Likes 0 · ·

Did you try the scratches osl shader?

0 Likes 0 · ·
Lee Griggs avatar image
Lee Griggs answered ·

Can you share some images of what you are getting vs what you want? Here is a working example of a roughness map (MtoA).


1586762436241.png (180.4 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.

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.