Xennified

Okay well... After struggling with Blender 3.1's UI I made a cylinder that would've been all hard edges when imported from Blender 2.79b, and the edges are all correctly smooth. Something about older versions of Blender just doesn't export auto smoothing properly, apparently. So I'm going to have to get used to this new UI.

Yeah I've been trying it at 60 degrees, have tried higher too and it doesn't change anything. Just tried the triangulate modifier on an otherwise unmodified 8-side cylinder, smoothing it in blender, and it's still all hard edges in SL. Are you using a newer version of Blender? I'm going to try that next since someone in a group said they didn't have the issue on a newer version.

Okay, even weirder. I'm testing how low-poly a cylinder SL will smooth, anything under 12 sides will be all hard edges, but 12 has SOME smooth edges, and a few hard? This is without joining it to another object or anything. So even without getting into whether I should boolean or join or whatever, something is very wrong here.

As I said in the post, I tried joining them first. Have been testing and it turns out any cylinder created with only 8 sides will have hard edges when uploaded to SL regardless of any smoothness settings from blender, even without it being joined to another object.

Hiya, here it is https://pasteall.org/blend/1a4ea87e30f6413ebbba28cbb25a2cdf

Blender's auto-smoothing generally imports well enough (though not perfectly), but I've been having issues when I join multiple objects together where sometimes an object (or rather, what used to be an object) will be all sharp edges and I can't figure out why or what I'm doing wrong. I've tried not smoothing them in blender until after the objects are joined, and that didn't help. Everything looks fine in Blender and changing the auto-smoothing angle in Blender doesn't help either. I don't really want to upload my models as huge linksets so if anyone knows what I'm doing wrong I would massively appreciate help. I'm still on Blender 2.79b if that changes anything, I'm still learning and didn't want a massive UI change throwing me off until I know what I'm doing. Edit: Thought I'd got it when I remembered booleans exist but... Nope. It still does the same thing.