max.m Posted November 4, 2009 Share Posted November 4, 2009 hi, i can`t get rid of the artefacts in the pillar in the image below. i made it with lathe, tried to check and uncheck all checkboxes there, but the artefacts stay. tried auto smooth on the pillar, no sucess. the material is a simple vraymaterial without refl. very thankfull for suggestions Link to comment Share on other sites More sharing options...
Bruce Hart Posted November 4, 2009 Share Posted November 4, 2009 This looks like something you would get with coplanar faces. Have you cloned the column on top of itself? Cheers Link to comment Share on other sites More sharing options...
nelpiper Posted November 4, 2009 Share Posted November 4, 2009 You should give us a little bit more information about your settings but this looks to me that the interp. samples for the IR are too low. This is what causes this splotches usually. Try bump up this setting. Good luck. Link to comment Share on other sites More sharing options...
max.m Posted November 4, 2009 Author Share Posted November 4, 2009 thanks for your replies, also thought of coplanar faces first time i saw the artefacts, but there is no other geometry. i also tried very hig settings with no result. i think it`s because of the geometry, must be something with the lathe mod. Link to comment Share on other sites More sharing options...
BrianKitts Posted November 4, 2009 Share Posted November 4, 2009 (edited) you tried high settings where? setting the irradiance map preset to "high" isn't going to solve this problem. This really looks like a lack of samples in your irradiance map. Try leaving the IRR preset set to low, but up your hemispherical subdivisions to somewhere around 30-50. Typically for exteriors, I find you can get away with a low preset and 30 subs, but sometimes requires going upwards towards 50 or so when you are getting a GI breakdown in your shadows. Edited November 4, 2009 by BrianKitts Link to comment Share on other sites More sharing options...
Bruce Hart Posted November 5, 2009 Share Posted November 5, 2009 It seems odd to me that the blotching seems only to be on the pillar, which suggests a geometry problem rather than irradiance - but I could be wrong. Does your lathe have the Centre button activated? If so the geometry can sweep on top of itself. Try shifting the lathe axis slightly and see if it changes things. Link to comment Share on other sites More sharing options...
raq007 Posted November 5, 2009 Share Posted November 5, 2009 hi, i can`t get rid of the artefacts in the pillar in the image below. i made it with lathe, tried to check and uncheck all checkboxes there, but the artefacts stay. tried auto smooth on the pillar, no sucess. the material is a simple vraymaterial without refl. very thankfull for suggestions Apply Shell Modify after Lathe... Link to comment Share on other sites More sharing options...
Nic H Posted November 5, 2009 Share Posted November 5, 2009 looks like a geometry problem dont shell a lathe just fix the profile instead Link to comment Share on other sites More sharing options...
max.m Posted November 5, 2009 Author Share Posted November 5, 2009 thanks for your replies. solved the problem. in lathe i use 359 instead of 360 degrees, and the artefacts are gone. i don`t know why, but it works:o Link to comment Share on other sites More sharing options...
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