Tutorial: Using Sims 4 Studio to Add an Accessory

A given part of the mesh cannot have joint assignment greater than 100%. If you're assigning a vertex to more than one bone make sure your total isn't too high.

Can you send me an example of an item you've added more than two swatches to that is causing your game to crash?

Hooray, welcome to the new world of TS4 glasses!  They need some work, but at least I was finally able to get a pair of shades into the game!  They're a conversion of one of my old TS3 shades.



I found out why I couldn't get glasses to work in-game (the lenses were showing up, but never the frames).  I theorised that it might be a bone assignment issue, and delved into that idea.  With the help of your tutorial on how to check bone assignments, I discovered that only the lenses were 'taking' my bone assignment with the Assign button but the frames weren't, for some unknown (to me) reason.  The lenses were showing up red after assigning, but the frames would not change from blue, as depicted below:



There's also the matter of each mesh having those weird extra bones that don't make sense.  I assigned the lenses to CAS_Glasses and left Spine1 unassigned.  Now the lenses worked fine in-game, but the frames were invisible.  I Googled on how to assign weights in Blender, because I had no clue what to do about the 'Assign' button not working for the frames, and came across a lesson on Weight Paint, something I'd never heard of before.

I was able to 'paint' the frames with the CAS_Glasses assignment, but I couldn't see past the sim model's head to be sure I got all the vertices.  I came out of Weight Paint and went back to try the regular Assign button once again, and for some reason, this time it worked - it's as if the Weight Paint thing kick-started it somehow.  Now the whole frame mesh went red, yayyy.  I left the other two oddball bones unassigned (Head and R_ThighTwist).  I was afraid leaving out Head might cause problems, but it seems to work fine in-game.

I hope the above will be helpful in case anyone else is struggling with getting glasses to work.  Now I just need to test it later in-game in Windows 8.1 to make sure it doesn't crash, which you are probably aware is a problem with new meshes for some 8.1 users.

Thank you again, OM, for this tutorial and the bone assignment one.  I would have never figured this out without them to point me in the right direction.    Now to get busy attempting to convert all my other glasses!

Oh yes, I'm aware that the frame and lenses are two different mesh groups and need to be selected to assign joints, having made numerous glasses for TS3 (but using Milkshape).  Maybe there's something glitchy in my installation of Blender but I could not for love or money get my selected frames mesh to take a joint assignation.  I deselected and reselected it many times and tried again and again, but nothing happened until I did that Weight Paint thing and then tried again.  Very strange.  But at least now I know what to do if it happens again!

orangemittens sorry I didn't saw your message, I gave up on that project so I deleted all files. I have a new problem, whenever I test my new hair in game, when using fat/muscle morph, mesh become distored, not too much but still deformed. I tried several times and it doesn't seem that the problem is with bones because previous necklace also had this problem with morphs. 

Anna, I received the .blend you sent but I need to know what you cloned to make this with.

thankyou very much for this helpfull post !