topic Re: Chamfer Issue in 3ds Max Modeling Forum

Chamfer Issue

raymondguo_cgi — Wed, 09 Jul 2025 10:58:34 GMT

I imported a STEP model into 3ds Max and applied a chamfer to the edge of a part. However, the result turned out like Image 01. I tried to limit the effect(shown in Image 02), the strange sharp spikes are gone, but the chamfer effect on the edges of the small hole doesn't look as good as in Image 01. Does anyone know how to fix this? Thanks! The file is attached.

Image 01

Image 02

Re: Chamfer Issue

A娘 — Thu, 10 Jul 2025 03:32:25 GMT

1st, you shouldn't add chamfer on a tri-mesh , chamfer is a quad-mesh based function , if you refuse to quadify your model , you should change chamfer mode to tri , not uniform , which was very lousy , worse than you had got.

2cd , your model has a smallest hard edge would be chamfered only with a 0.003 mm area , but you give it a 0.5 mm chamfer , when you give a big quad chamfer to a small area edge , it will be fly out along the normal when chamfered edge touch the border of the face ， that's why so many thorns in your model.

3rd, when you enabled limit effect , all area to too small would be limited to expand , this will prevent vertex fly out and face become degenerated.

a easy fix way was re-poly the out hole topology to uniform quadify , if other area needed , some

Re: Chamfer Issue

raymondguo_cgi — Fri, 11 Jul 2025 01:50:56 GMT

Thanks for your reply. I have three questions:

If I want to chamfer the model by 1 mm, how can I achieve that?
I tried to quadify the model, but the chamfer didn't turn out as expected, even when I reduced the amount to 0.1(please refer to Image 01)
I failed to apply anisotropic reflection to the top surface of my model, even though the same material works fine on a teapot. Do you know how to fix this?
Please refer to Image 02, I use Corona 13 as the renderer. The material map is in Image 03.
Issue with Anisotropic Reflection on a Cylinder
I created a cylinder without any chamfering, and initially, there was no anisotropic reflection. Even after applying a Chamfer modifier in Smooth Chamfers Only mode, the anisotropic reflection still didn’t appear (refer to Image 04).
However, when I switched the mode to Smooth Entire Object, the anisotropic reflection became visible (refer to Image 05).
That said, there’s still a flaw — in the center of the top surface, there’s a perfectly flat circular area where the anisotropic reflection is missing (refer to Image 06).

The file is attached at the end, thanks for your patience.

Image 01

Image 02

Image 03

Image 04

Image 05

Image 06

Re: Chamfer Issue

A娘 — Fri, 11 Jul 2025 04:09:14 GMT

for chamfer , usually not add to whole model , select edges at edit_poly , and add chamfer , only selected will be chamfered , add stacks for every group of edges need chamfer

for anisotropic , plane won't act as curved surface ，it can't reflect highlight area by any angle ，you can only see it from angle of reflection
infact , anisotropic works well , you can set a hdr as reflection environment , check it

for last , the wrong anisotropic of plane was a bug of corona , it won't show an acceptable highlight , same model will work well with vray , and 2 renderer shows different heightlight

Re: Chamfer Issue

raymondguo_cgi — Sat, 12 Jul 2025 00:17:11 GMT

Hello there, you're Chinese?

Re: Chamfer Issue

A娘 — Sat, 12 Jul 2025 04:22:09 GMT

yes

Re: Chamfer Issue

raymondguo_cgi — Mon, 14 Jul 2025 00:38:21 GMT

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Re: Chamfer Issue

A娘 — Mon, 14 Jul 2025 06:23:42 GMT

不用微信干活,加q2383321或进群51957342

Re: Chamfer Issue

raymondguo_cgi — Tue, 15 Jul 2025 01:37:29 GMT

好嘞谢谢老哥