Quad Draw surface tolerance

[Parmenides]

Is there a way to adjust the surface tolerance for Quad Draw? I have a relatively thin object and when I extend loops the vertices jump to the other side of the mesh even when I move extremely small distances. 

[Anonymous]

Maybe adjust the auto-weld setting? Looks like that's the problem.

[cornelh]

@Parmenides

I do think this is due to your auto-weld tolerances, and/or a combination of your file.  are you using quad-draw on the object it'self? or are you using quad draw over an object you have hidden in the viewport?  If you can send me your file via PM, I can be more informed as to what is actually happening.  I look forward to your reply.  Thank you.  (Also what version of Maya are you using?  What Operation System is this running on?)  Cheers,

[Parmenides]

Thanks Cornel, yes the object was a propeller shape that I was using quad-draw on as a live surface and it was hidden to make the screenshots more clear. I had tried changing the auto-weld settings in small increments but it went from not sticking to the surface at all to jumping to the other side of the mesh. Sorry, I don't have the file anymore. 

Mac OS 10.12.1  Maya 2016.5. 

[cornelh · Accepted solution]

@Parmenides

Your issue was most likely a factor of scale and auto-weld tolerances.  next time you have this issue try to scale up the model you are doing quad draw on, or change the scale input (cm to meters, etc..)  this could have issues with files coming from other sources, as the scale might be way too small or way too big.  This scale issue also affects some of the sculpting tools.  Best of luck.