Basically I have a volume job of 350 renders for a company that specializes in metal framing for cable management.
Now, the issue is that for some reason I get weird lines and dark spots on my renders sometimes. Not sure why exactly. And I don’t remember whether this was an issue in 1.7 (currently using Corona 2).
I tried checking for the obvious things, like flipped normals, double geometry, etc - couldn’t really find a fault.
The scene file (textures and model included) can be found HERE.
The reason I mentioned I have 350 of these to do is because I don’t want a “just fix it in photoshop” as a solution, because it would be impractical for such a volume.
In the mean time, I’ll see if I have an install of Corona 1.7 to test with as I’m pretty sure I’ve not seen these error before.
Ok, this is something to do with incorrect rendering of anisotropy. If I use the exact same material without any anisotropy - it has no dark spots and stripes. If I DO use anisotropy, but disable my aniso rotation map - the problem still persists (just seems to be inverted). Can someone explain to me what might be going on here? Kinda need aniso to work here…
I’ve just remodelled the piece nearest the camera and applied your material and approximately matched the mapping and it works fine.
CAD Geometry like this is always horrendous, you might be better asking for the native files, you might find they’re proper nurbs based models from Rhino or Inventor or something similar, in which case they should be able to send stp or iges files which would better maintain the smoothing and geometry curves
Thanks for the reply. Once nkilar mentioned CAD I started investigating. Basically what I need to do on import is reset the xform and everything renders fault-free
Though I had to adjust my material to match the agreed-upon “flake” size of the galvanized steel. So I’m setting up a new master blank max file prepared for import now… Ah well!
That being said, I don’t know if you noticed that I included an IGS file next to the MAX file - these are curve body files (I have no clue made in what, though). That’s what we got sent, 350 of those.
Well, resetting the xforms still beats remodelling anything or pesterring the client for anything other than what they have, since they have no clue how any of this works to begin with (and we’re dealing with the middle-men too…)
Though I have another issue now - the parts don’t have enough subdivision resolution and are all low-poly, the curves look nasty. So far the solution seems to be to pick the part, go into the body properties, check “use viewport mesh” in rendering approximation tab and…do that for all the other parts…at which point it’s still faster to import as mesh and reset the xform on the whole thing.
Well, whatever works for you. But render/curve quality should be good when using “Production” in “Rendering Approximation” (it defaults to that here, dunno if this is a global or local setting).
