I have found one workaround so far that seems to force the render to behave. The geometry is procedurally created in CityEngine. The offending geometry in the scene is the “sidewalk” object. But the way it is generated is that the entire sidewalk is like an arterial system created as one object for the entire scene. Its really large, and is very oddly shaped. But the geometry appears to be fine. The Maya Software renderer handles it just fine.
What I seem to have discovered is that if I break it up into smaller segments the shading bugs go away. Its almost as if Arnold is applying a smooth shading override to the surface. Even though I’ve set normals on the surface to face, applied hard edges, every attempt to modify normals in some substantial way has failed to affect the shading bug. Incidentally there are other really large “organs” in this scene. But they are comprised of smaller groups that are disconnected from the other groups but still as one large single object. They render fine. It only seems to be an issue with large objects with contiguously connected elements. Does anyone know what gives with this? Is Arnold trying to do something special that affects objects of immense size that are contiguously connected? Joey From: softimage-boun...@listproc.autodesk.com [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Ponthieux, Joseph G. (LARC-E1A)[LITES II] Sent: Friday, June 01, 2018 9:42 AM To: Official Softimage Users Mailing List. https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_forum_-23-21forum_xsi-5Flist&d=DwIGaQ&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=WeBgKUi0r7g21ELtA-TwP7KnYXM8QJg-o8QtYgF2vxs&s=_I6V9vEAkSnIqUVE9A9ZGOB2E2BwkaK3RP-YbQlFmxY&e= <softimage@listproc.autodesk.com> Subject: RE: A pain in the Arnold... Nope. First thing I checked. CV counts at each vertex are 1. There is no non-manifold geometry that I can find related to the objects with the anomaly. Besides, if it were the geometry, I would expect that removing the texture would not remove the anomaly. If there is no texture, the bug is not present. Thanks From: softimage-boun...@listproc.autodesk.com<mailto:softimage-boun...@listproc.autodesk.com> [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Jordi Bares Sent: Friday, June 01, 2018 9:36 AM To: Official Softimage Users Mailing List. https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_forum_-23-21forum_xsi-5Flist&d=DwIGaQ&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=WeBgKUi0r7g21ELtA-TwP7KnYXM8QJg-o8QtYgF2vxs&s=_I6V9vEAkSnIqUVE9A9ZGOB2E2BwkaK3RP-YbQlFmxY&e= <softimage@listproc.autodesk.com<mailto:softimage@listproc.autodesk.com>> Subject: Re: A pain in the Arnold... I would suggest you double check the geometry, is it possible you have double triangles? jb On 1 Jun 2018, at 14:32, Ponthieux, Joseph G. (LARC-E1A)[LITES II] <j.ponthi...@nasa.gov<mailto:j.ponthi...@nasa.gov>> wrote: The original shader was a Lambert material with an image and a texture placement. Replacing the shader elements with like for like makes no difference. Replacing the file and Lambert nodes with aiImage and aiStandardSurface also made no difference. I also replaced the SG and deleted the texture placement. No change. Bummer. Thanks anyway! joey From: softimage-boun...@listproc.autodesk.com<mailto:softimage-boun...@listproc.autodesk.com> [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Ponthieux, Joseph G. (LARC-E1A)[LITES II] Sent: Friday, June 01, 2018 9:06 AM To: Official Softimage Users Mailing List. https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_forum_-23-21forum_xsi-5Flist&d=DwIGaQ&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=WeBgKUi0r7g21ELtA-TwP7KnYXM8QJg-o8QtYgF2vxs&s=_I6V9vEAkSnIqUVE9A9ZGOB2E2BwkaK3RP-YbQlFmxY&e=<https://u7507473.ct.sendgrid.net/wf/click?upn=5SmYwFIJXHmC5X9wAP0G6iB4H67OtDu1LYz6krlc8-2FqBeLCXrELBQVbfMn71cNywwCM9MLKQNt6NvY2bdnUVgiRuzEw0g0OZUwVhB4KIDvkjTtq34l13Jmfjgwg01isCCK511SfOUct9zBCzgDFFRDQYDmMAnI51v58fSyJgwB-2Bw0HHExUkkOtQLVEEC4Qhtsu4bZyg5N-2FfAtwcPMobUPdkvDj8QW0p8f4FTefP2WavKn-2Fx65NPPlm7AfadGWXCfkHc9qfaMqjIImPprDPCrSzZ2VKrm3aO-2FQ-2BbdhcdcgirtEg4r6Id0hVef-2FpU1yTe6T9cdWQd0n3ZMWIoXhYpZRhwrFiH0HsCo2dnuF4wP549NX-2FDYXiWyxF1V6-2F1QCSMMy3S1xlT-2Fi1ChrnnlCJfGOzz7WMSt1T-2BrH0FDyG5U9ODUOg8oJxJoMA-2F5z0btvf4WgDxlFPonPVoRp74VnshrXXHasw3c-2BCWnGgQ5IY5jtN06u23JXKZCAsMmV-2BlPxc935fDiRKMa82xdjeAjNSW9yfBiJPupzDfi6ycnDiL981JYAAxOWDhqWPyL8AxLpgxdzAbRW2Zw-2BFsgsGZ3K2Rd6zU1lFKeCpqeI0-2BapG67nGs4TjpOXvCUn3SMX0-2BrmkHe1mycqE5vPbq8nEFoOli2BTaXOKLQ5gJJXiYFzmAQdaNLEPbZ5ySL-2BU6xUfiXVEKWf5R07x8EVKwU0Mup0Bif96Je2Aj8XHiktVTtYWuH9ou6-2Bv-2FUwmz871sQhem0Zn5LtMPwfR1ZTP4TkXqO7Lo0Z471uyAXQEdQYuNqqqG1RKJjXh1-2B8girIPnModsOJA-2FnPcF5eqeSxFadUIX3W1T2d-2FWZVDz-2BF2b7rTWanIMwJ8xkFnqE1NU5-2FdquHMkm6QAzn2v7KHpHsRmjB09Rr3BZ7GArV8b9dfzjekne7KD-2F8XkIcd05dZR7SdEtX5EJguHEkxR8jhtaFPuucL3BEAWF1yba8ESuMxP5B-2BNy8PPJc7o-3D_P15EezqoXxlMCaXPKpJEY-2BWEWEtgOkXFjp4zcMhbF34buUVehARI7OyDcqSa3eWAGXx0CivownULceLbHlyrJ0lvL-2FIJQLCQxTVhGaTueygu-2FiIbOzjqOYaF09wv-2F4mBFWzBG1KQddn7Q7i5-2Ffo6SrWQ-2FVwiDcNlBg-2B61wQdf-2BQEidyXHG1rR8IxUJJ3sV7K-2Fm0ujXHU569ypg1ipkm8s-2FOOEJKjdnGho7lBpui4WiQ-3D><softimage@listproc.autodesk.com<mailto:softimage@listproc.autodesk.com>> Subject: RE: A pain in the Arnold... No. In part because the scene has over 900 shaders. The thought of having to edit every one to make Arnold happy is not a pleasant one. I’ll look into though. Stay tuned. Thanks Joey From: softimage-boun...@listproc.autodesk.com<mailto:softimage-boun...@listproc.autodesk.com> [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Gregor Punchatz Sent: Thursday, May 31, 2018 6:24 PM To: Official Softimage Users Mailing List. https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_forum_-23-21forum_xsi-5Flist&d=DwIGaQ&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=WeBgKUi0r7g21ELtA-TwP7KnYXM8QJg-o8QtYgF2vxs&s=_I6V9vEAkSnIqUVE9A9ZGOB2E2BwkaK3RP-YbQlFmxY&e=<https://u7507473.ct.sendgrid.net/wf/click?upn=5SmYwFIJXHmC5X9wAP0G6iB4H67OtDu1LYz6krlc8-2FqBeLCXrELBQVbfMn71cNywwCM9MLKQNt6NvY2bdnUVgiRuzEw0g0OZUwVhB4KIDvkjTtq34l13Jmfjgwg01isCCK511SfOUct9zBCzgDFFRO-2FaVrThr3vNXUM7RiWhBe-2BeNhsuRVYy8WcsXk6VbpXImEfuRQawGiawr4d49P-2FHnLnlELB9OOSGEp8kBIqiFZxa2fSH2uroog4eQsi5i0iGOvAlBanKasL72X371xL3Z1-2FMAUK-2F1-2Bn7d4-2Fi9jwJGmD-2FXB0QlJXgqMM4kstz-2Fm56HjIsU-2BkoNKiHaHAxbA8n7qCi7fJECJ12MiQJpTrx2jdE49NqRrJkn4Q-2Fszsa7EjTT9C088PLVQZnnIwOjtvjK3hLbgtxWKidhQjFEXXW-2BL5WnPM-2B0HvgfNrk3Oe92nIpgcPX0XlnK2OIuD8kpyo663pcBt-2F4J-2F2K2okHdTjgcR5anVpYMjYF1KWqv0vvj3GGTq1qJlroHS9W3OUh9bijBuSTAitm8eo1bdrKltqidYu-2ByjeNoevdMnfdUu7v6A5MVuq-2FaF-2BEu8x40QgWGfuByLun0B9lhgHzQDoEkpYdb2PSYKE5KOzwfzKEVa2XGyeQbTTIOUBofjg4-2FdYOxdhsoldtluKLukNWAhs657C8-2F3iVKE6yoFH-2FTCm9ScO3NkKqUcqufO-2Fr37mKqcN7Q0Vly5mu531GfueS94neqpvZCuXJSzb2SsVgS-2B9tkfK2o1SJ2tzJy-2FLop0LvSkFMCeRSLMBoFKy6dQhzQuXn5ZuMFLiu5ZXgUfrj5r9nXWBHag4-2Bi-2BI4wC0QyV5zxdnqGmOZ9O2sjMmuCOBfcQ0ZqwME3-2BrOJXaEe2dokb0zhvgNMYlrINu9hFMqN0-2BMGm-2F9mPgsc0KeW-2FV6LZvuh8VSQhTJWFs0Wlx-2B0j1acU15MBBbz9tPPz-2FPEL6PKBsv54FS-2Bg6EHI9jj9r1xiaFvyydXdjnee9tQHHoMJfzhYx-2FrnMiIVlm6jhhzzS6pYXegmx1u53uulQNuX8Msfx029XbSI2aABrWdgGyreMuCd0-2B-2FTVZHh7RXYh-2Fawi58PiL5zT20XYpb-2BxbbZLd7FeBiKDitStDADEHrz2E6uuX1PkhNnmilV52XtSpI4oDjfsU54NpWWK08DrocbVNqiqMS1EUjO36UaTkRocoMgYOllX0wzZfci8E2O3T6hUVFnti93a11AIwJHxPypUqqeixZosSW5Qske6u6itnA9wZcxzyZZWj-2BAQtweN-2B8xfbvj8S5XZ5Hc95HuNcbEMkV9luNlIv2IULwDdGtA3cLnT-2FKy7Kuyga8nvwlpqY9be57W5B9nUJ357SeqtJZDC8JC75qnBvA-2BVkNxCrchme-2FGTnvyXc5uE1Tb3RhftSIT-2FrZWVfFRyyaNKSA6GKuuoTcVCAAWaTs45I1rij5TapFCBmo75XGSpvtbWwY0OMtNZqaTmgVQEPE5UB-2F-2FoUzDx30GcciRN8ONA3bYhdIEJtH1cASbMxWF2e5eCjk0EdVTc0I8H6QTFLM-2BB8m8a-2BupYnC3iVvEnq1IgBFhNWUHpI9OS2o2sLfnasYcVPoIRETnI4CDSaIif4tfKfz2VDiLxvynACwzyzMp2OOYR7DcNhl7qkNGYI0WJ9jV-2FRNPTPPbp-2FmAQRBar2imHvd7SfnrfdEtYmXf3qch9pqxez8pchzJLEnguRjhOdrxsbxKPZLXiw8P1rJ8NOKNeGKnfanPXXt-2FaQuS9Ecw06GHigxGDLGu-2FiqkJf-2Bi9LQQk1owygG-2FiYtIPY7Bdj8qFlKXI71nJkX2IIwGskw0GmkOCMarj0DMsF7RiuvFPvA5hAcFFfo8E3HULD6bFAwnzmckmu5etPR3EHgRPkmUag6WU3DJfh3RHI38BHT00W6S0qpWHUDfve><softimage@listproc.autodesk.com<mailto:softimage@listproc.autodesk.com>> Subject: Re: A pain in the Arnold... Hmmm... have you tried rebuilding the shaders??? On Thu, May 31, 2018 at 2:14 PM, Ponthieux, Joseph G. (LARC-E1A)[LITES II] <j.ponthi...@nasa.gov<mailto:j.ponthi...@nasa.gov>> wrote: Howdy yall, I thought I would post here before I escalate this but… Arnold on Maya 2018 is producing an error in render… I’ve got an ESRI City Engine scene imported into Maya 2018, It was working fine under Maya 2017 and rendering fine in Mental Ray. But mental Ray is gone now. 1. It renders in the Maya Software render fine. 2. In Arnold it produces what looks like triangulation (Tessellation) errors rendering some triangles darker than others. 3. It only produces the problem on materials with texture maps. 4. Disconnecting the textures from the diffuse color removes the problem. But removes the texture also. But this seems to indicate its not a lighting, normals, or shading error. 5. I’ve turned literally everything in Arnold settings off or neutral and no change. 6. Its not shadows, nor anti-aliasing, nor duplicate polygons, nor a bad mesh. 7. Forcing a triangulate on the mesh can make different triangles darker but the problem does not go away. 8. All reflections, shadows, motion blur, etc have been turned off in Maya and Arnold for Render Settings and Object. No change. Any thoughts? Thanks Joey ------ Softimage Mailing List. To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com<mailto:softimage-requ...@listproc.autodesk.com> with "unsubscribe" in the subject, and reply to confirm. ------ Softimage Mailing List. To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com<mailto:softimage-requ...@listproc.autodesk.com> with "unsubscribe" in the subject, and reply to confirm.
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