question

Soal Givord avatar image
Soal Givord asked ·

Black pixels / dots / holes / artifacts in renders ?

Hello, i have strange black pixels / dots / holes / artifacts in my renders, it happens randomly on the rendered sequence.

Scene specs :

- Mtoa 3.1.1.1 and Maya 2017 update 4

- animated camera and animated objects with geometry cache

- lighting with a skydome light and an hdr image

- Samples : 6,4,4,2 ( tested with 8,4,4,2 also)

- i tested changing the hdr image but i still have dots at the same positions

- i tested lock/unlock sampling paterns, adaptive sampling on/off, increasing diffuse/spec samples but i still have black dots / spots / pixels randomly on some images

- i tested decreasing the filter width, it reduces the spots size but the render looks noisyer

- i tested with locked camera also

- spots seams to appear on the indirects AOVs only

- spots are not affecting Alpha channel

i realy have no clue on what is happening.

Can you please help? :)

Thanks

Have a good day

Soal

rendermtoaarnold5
black-dots.jpg (225.8 KiB)
black-dots2.jpg (168.0 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.

1 Answer

· Write an Answer
Soal Givord avatar image
Soal Givord answered ·

So the problem was the indirect rays comming from my ground geo with an aiStandardSurface and a projected texture on it. It seams the texture had weird pixel values, so i just added a clamp node after the file texture node and it fixed the problem.

Thanks

Soal

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.