This is a CAT rig started from scratch. I started the arm again, and still had the same issue until that is... I changed the dimensions of the CAT helper boxes and it gave me a better result. So I'm assuming the issue relates to the size of the CAT helper boxes. That's not to say it's perfect. The bones now stay within…
The 99.99999 etc. might just be floating point accuracy, but I wouldn't recommend to work in meters as system units for a human sized model (the display units don't really matter). It should be fine, but cm would be a better choice. Not on 2024 and haven't used CAT, but is this the original CAT rig? Since the orientation…
Sorry I haven't used CAT so I can't really help with your issue. Some of the arm bones do have non 100% scale, and it's not a huge amount per bone, but maybe this could be compounded as it travels down the hierarchy?
It does look like it's Skin rather than CAT that's being wonky. I've not rigged anything in max for a couple of years but I too have seen skin create silly sized envelope bone thingies on several occasions. iirc you can edit them manually and copy/mirror them in the same way you can vertex weights
I've had this on two models now. I'm rather new to riggging and skinning but I can't figure out what I'm doing wrong here. Model was xformed before rigging and adding skin modifier. The model and geo is all zeroed out. What is causing this issue? I'm working in Meters, could that be it? Is the hand geo insufficent? I'm at…