Rendering artifacts

Support Lighting and Rendering
1

Hi. How can I fix these rendering artifacts(gradient lines)? Thanks

p.s blender file is included.

1.JPG1252×705 13.1 KB

Logo_3.zip (87 KB)

2

Render > Postprocessing > Dither:


3

disregard… same as above, but late

4

Thanks. It worked. But it have a litte noise. How can I remove that? Thanks again.

5

Well, dithering adds noise to avoid banding.
You can either have noise or banding, but not avoid both (when using 8 bit image formats).
The alternative would be to save as 16 bit PNG or EXR, but then only some programs will be able to read the image.

6

Thank you for the explanation.