Hello guys, I have some problems with rendering such kind of geometry:
But I get two different variations of this object in render:
Where is the problem? Model was created in sketchup, exported into 3ds max. Full resolution of this view is 4000x3000. Nothing changed in corona settings. Thank you in advance
It looks like moire to me. At higher resolution this should go away or at least should be less noticeable. Could you show crop from full resolution image?
Yup, its moire (good to know how its called), tried to render in 8000x6000 resolution and it worked. Thank you.
You can try to reduce image filtering (do not confuse with bitmap filtering) or even completely turn it off and see if it helps at lower resolutions.
Besides what has been said already, if it is background stuff you can prefilter the texture (bitmap filtering, not image filtering for maximal confusion 
)
If you blur out the detail, no moire will be created. If its in the background its a quick and dirty fix.