I have some faces lines showing in the object shading workspace in cycles

Hi sstephanemg ,

Your Autosmooth isn't working (the Treshold Angle is greyed out). Try clearing the Custom Split Normals Data here:

Maybe that'll already be enough.

Otherwise you might try lowering the Angle a bit, if there still are those shading artefacts...

Better even is to adjust the Geometry a bit, but we'd need to see your .blend file to be able to see if that is necessary.

You can upload your .blend to Googledrive, Dropbox, or similar and post a link here.

We actually did a Livestream on Discord  only two days ago, that covered this situation in depth (among other subjects). The recording should be available soon.

Here is a similar issue:

https://cgcookie.mavenseed.com/community/13396-why-i-have-some-weird-shading-on-the-surface

with elaborate answers.

Thanks for the file! That really helps:

first, your top Faces that should be flat are not, which you can see in the Front and Side Orthographic Views:

Select them and then pres S, Z, 0.

Then there also some Double Vertices that are causing problems (especially with the Bevel Modifier).

Select everything (press A, in Edit Mode!) and then M > Merge by Distance.

I think that is all, but let us know if there are still issues left that I may have missed.

sstephanemg ,

Just in case you are interrested, here's the link to the Livestream recording:

https://youtu.be/1KdEaO_fvzg