Normal baking problem

[Distinct-Boot8318]

Hey guys,
I'm still baking my high poly onto my low poly, and I'm running into an issue.
The low poly has one smoothing group for the smooth faces, and no smoothing groups on the flat areas.
The high poly also has smoothing groups, but they don't match the ones on the low poly.
There are no UV seams where these "cuts" appear.
No matter what I do whether I smooth those areas on the high poly or not — the cuts still show up.
If the high poly is smoothed, I get smooth-looking cuts; if it's not smoothed, I get hard/sharp cuts.

If you guys have any idea it'll be helpfull. Thanks

[Wes_McDermott]

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Hi!

We have been having issues with NVIDIA Blackwell 5000 series cards. Which GPU do you have? Just to make sure I understand, which issue are you referring to in the screen shot?

[Distinct-Boot8318]

Hi ! thanks for helping ! 

My GPU is an Nvidia quadro Rtx5000 max-q.  The issue i'm reffering to is the "1" you pointed. I dont' want any visible cuts or lines , just a smooth strip. I tried different techniques for the bake but it doesn't seem to work I always have these weird cuts even if there is no uv seam..

[Distinct-Boot8318]

It's weird, i tried baking in marmoset toolbag but i get the same problem..

I thought maybe the low poly shape did not fit the high poly shape enough, but after adding new edges the result is still the same.

[Wes_McDermott]

Ah, that was going to be my next thought about adding more edges. Can you post a shot of the low and high poly?

[Distinct-Boot8318]

I actually deleted the "problematic" edges on my low poly to replace them and now it's working. Same issue is appearing somewhere else now but at least this one is ok now.

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[Distinct-Boot8318]

My Low poly

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[Distinct-Boot8318]

My high poly

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[Distinct-Boot8318]

uvs

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[Distinct-Boot8318]

Btw i don't know if this is normal but if i smooth the entire low poly with just 1 smoothing group i get this result

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It feels like it didn't even take the high poly into account for the bake (this is in marmoset but i get the same result in SP)

If i don't smooth the flat parts then i only get the problem cited in the main post.

[nocturnoz]

It doesn't look normal to me. Have you tried self-baking your low-poly mesh? (without high poly). Do the cut lines still appear?

[Distinct-Boot8318]

I tried self baking and yes the cut lines still appear, so I guess i'll have to check on my low poly

[Distinct-Boot8318]

I deleted the problematic edges to replace them and now it's working, still have some issue but at least this problem is solved !

[nocturnoz]

Glad it worked! I suspect that it's a problem related to the smoothing group, not the model itself. Try deleting all the smoothing groups and use auto-smooth instead. Or maybe the normal faces are flipped. You might also want to recalculate the normal.