Small edges and corners not rounding properly using either Uniform, Radial or Patch chamfer.

[adamkenyon_3dart]

Hello, I got a strange issue never in my years of using max had this before. My project I am making is to real world scale units (cm) but when I am building my high poly workflow, chamfers on edges using Uniform or even Radial at 0.5 are square-ish and the corners leave spikey deformations. If i increase the size of the chamfer a lot more then it will go more rounded and the corners sort of get corrected, but sometimes I am having to increase it way too much and therefore useless for high poly baking edges on a small object.

I have a powerful PC and monitor and using the 3DS Max 2026 trial. 

I have tried the following:

• Reset Xform on everything
• Increasing the scale bigger
• Resetting all transformations to 0,0,0
• Tried changing units to mm and even Meters 
• Tried other primitive objects
• Reinstalled graphics drivers

I have attached a gif and screens, the model is 4cm wide and about 2cm tall.

I shouldn't have issues with creating small chamfered edges that are rounded.

[casey_hawley]

Maybe a bug, but I can't be sure because I've never used such miniscule chamfers.

I work in inches and .001 cm = 0.0003937 inches, or about 4/10,000ths of a cm. I had to do the conversion in order to understand just how small we're talking here and dang that's very VERY VERYVERYVERY small! 

Max is only accurate to the third decimal (.000), so when trying to chamfer 4/10,000th of a cm, one should not expect accuracy. Not sure if that small of detail would even translate in the bake. Maybe lower the subdivisions and use smoothing groups to fake the rounding at render.

That said, modeling that small of detail by hand is totally possible. Are you going to do super-close-up renders? That would be a legit reason to spend the extra time.

@casey_hawley - this post has been edited due to Community Rules & Etiquette violation.

[leeminardi]

Try reducing the Chamfer Edge Depth value.

Make sure that your geometry is not far from the World origin of 0,0,0.  Max has a precision of about 7 significant digits.  If your geometry is all within a box about 100 units per side  centered at 0,0,0 this translates to about 5 decimal places (2 of the 7 for the digits to the left of the decimal point and 5 digits to the right).