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Description of problem: The subdivision modifier creates extremely broken meshes. Vertices appear to be placed randomly and probably some at infinity. Version-Release number of selected component (if applicable): blender-3.5.1-3.fc38.x86_64 How reproducible: Always? Steps to Reproduce: 1. Create a new, default document (or create any mesh). 2. Apply subdivision modifier. Actual results: The mesh either disappears or produces something that is clearly utter garbage. (If faces are visible at all, they look like noise and are completely black.) Expected results: Subdivision works as in 3.3 and 3.4. Additional info: blender-1:3.4.1-16.fc38.x86_64 does not seem to be affected.
Would you provide a screenshot to see the issue? I failed to reproduce the problem witht eh current version of Blender on AMD Ryzen 7 5825U.
Created attachment 1968849 [details] Screenshot show how subvidision works
That's... interesting. It seems to be behaving itself now. I've rebooted, but it was doing it from a relatively fresh boot previously. I'm going to chalk it up to either: - A *VERY* strange fluke. - The previous installation was corrupt, somehow. - Somehow caused by having run 3.3.fc36 previously followed by 3.5.fc38, and somehow fixed after running 3.4.fc38? I'd been using a somewhat-old version of the fc36 package for some time (circa August 2022 at a guess). A few days ago, Blender wedged my machine (thank you Intel GPU drivers), which I used as an excuse to upgrade to fc38. I installed the latest fc36 version (while the older version was running, I think). I don't recall if I launched the latest fc36 version. I then did a distro-upgrade. After my first boot into fc38, it was broken. I subsequently downgraded to 3.4.fc38, which worked. After upgrading back to 3.5.1-3.fc38, it seems okay. I have no clue if something peculiar to that chain of actions caused it, or what. As a professional software developer that's sometimes worked with 3D code, I'm confident what I saw was completely bogus and often non-finite vertex positions being generated, probably with invalid normals (i.e. values not in [-1, +1]) as well (explaining why, when I could see *anything*, it was solid black). What would cause *that specifically* (i.e. subdivision) to go haywire without Blender just plain crashing, I have not a clue. Very, very strange. I guess I'll close this; if it happens again, I'll re-open with a screen shot. Meanwhile, this will be 'on file' in case anyone else runs into the same issue.