topic Re: triangles in render in Fusion Design, Validate & Document Forum

triangles in render

louisG8UJ3 — Tue, 04 Oct 2022 08:00:18 GMT

hi there,

i have 3735229 polygons in my OBJ 3d-model, more then enough to make my object look smooth in render canvas. now I wanna go for the real render settings on the tea cup in fusion 360. when I finished the render the object gets triangles. I mean how?? can someone explain me?

thankyou!

Re: triangles in render

TrippyLighting — Tue, 04 Oct 2022 09:50:07 GMT

The effect you see is very likely due to Z-Fighting. So check you model for duplicate geometry. That might require using a polygon/mesh/Sub-D modeling software such as Blender etc.

Re: triangles in render

louisG8UJ3 — Tue, 04 Oct 2022 12:38:58 GMT

hi there,

sorry but how do you mean using blender? render with blender or just import / export the model for another filetype? I used 3dm and iges files on fusion and it worked really well! I prefer the autodesk render facility.

btw, thank you for your response!

Re: triangles in render

TrippyLighting — Tue, 04 Oct 2022 13:46:29 GMT

Are you sure you've read my entire post?

How would you address a Z-Fighting issue (duplicate faces or mesh bodies ) on a mesh with Fusion 360?

Re: triangles in render

louisG8UJ3 — Tue, 04 Oct 2022 14:07:55 GMT

sorry bit i'am still a beginner, I was thinking about dielectric priority control

Re: triangles in render

TrippyLighting — Tue, 04 Oct 2022 14:53:00 GMT

@louisG8UJ3 wrote:
sorry bit i'am still a beginner, I was thinking about dielectric priority control

No, that only helps assigning priorities to (clearly) overlapping solid geometry (no meshes) with transparent materials.

Think about liquid in a glass. the glass and liquid have different indexes of refraction (IOR). To render that properly in Fusion 360 and many other render engines, the geometry must overlap. The Dielectric priority then is used to prioritize the glass over the liquid.

The problem with your data set is that its a mesh that perhaps has duplicate mesh bodies in it. One of them has to be removed and I am not sure that Fusion 360 can do that. Blender can, and perhaps also Meshmixer.

Re: triangles in render

hfcandrew — Tue, 04 Oct 2022 15:57:16 GMT

Windows 3D Builder - autorepair on import, works like magic