I would ask for advice on AO render. The most of surfaces is perfect but the Cylindrical surface of Airtank seems to have some issue. On the edges of the polygon forming the round cylinder there are shadow lines - that shouldn't be, making it look jaggedy in game.
So my question would be how to make AO of cylinder look smooth?
I thought to make another mat -> another higher resolution AO just for the cylinder -> but that is probably not the best way to go since its best to have as little number of dds files as possible (correct me here if i'm wrong)?
as a quick test, move this object out of the frame (3-5 meters away) and render it again. Just to find out whether this is self-affecting issue or some objects around give this effect. If this is a self-affecting case (still get bad shading on this object), send me a .z3d file with just this problematic object there, I will take a look what is the cause.
P.S. use Surface\Nornals\Calculate and Surface\Normals\Smooth before AO-rendering, as surface normals on original 3D model are used in AO computation. Bad normals can give artifacts.
I made chamfers on cylindrical body: polygon mode -> slicing tool (adding the splitting line) -> center the pivot -> scale in appropriate views and directions -> calculate normals (C) -> smooth vertices
And the cylinder still looks jagged both in Zmodeler3 and the game.
Please help how to make this appear smooth.
Thank you.
something is not good with the topology of the mesh. I think it should have outline edges on capping and chamfer. so the surface\normals\calcualte gives an accurate shading and sharp edges. then you can smooth these sharp edges with surface\normals\smooth.
also, keep in mind that environment reflection texture on your material is not accurate and can give inaccurate visual perception of the surface/shape.
I'm losing my marbles. I need some help. The ones marked dark blue are mode from cylinder object in Zmodeler and still when smooth normals applied its AO looks like this. With jagged lines. Light blue are the same problem but not made from Zmodeler origin. Orange and light blue parts are made with CAD and then to STL -> Blender -> OBJ -> Zmodeler and exact same issue. I tried smoothing of normals in Blender before export as well and still the same issue. Rendered AO 2k 128rays to 192rays in 4k, result is the same. I mean I tested every possible way I could think of, adjusting smoothing value parameters like angle from 5°and 45°, its probably 10 more things I could do I just lack time. Any suggestions what is going on, otherwise i'll call it a day, and publish such jaggedy AO, spent 2 days on this alone.
I quick-tested an unwrapped cylinder with AO render and see nothing specific. I advise to make a render with no other objects visible in scene, so nothing affects the rendered object at all (just to check self-shadows in AO render). There should be no artifacts in such a render; then you can render with more objects to see whether any issue appears. I guess the issue is caused by some object in your scene.
Yes, it appears that some old object is causing the issue.
I have moved the geometry in question away from the rest and its a bit better, not perfect. Exact AO problem happens in blender as well.
Mind if I ask what specifically may be the cause? Just generally what to look for - I really would not wanna rework the entire thing from ground up. Perhaps deleting parts until I get the culprit. I suspect that perhaps some internal surfaces of these steel beams near the cylinders (and there are plenty because of how the old model was built) could be the cause. I wanna make sure problem is eliminated from the model before I make any new geometry.
artifacts are usually caused by inaccuracy of math inside 32-bit floating point values. An extremely high or low values in computation (very big or very small objects), or very tiny triangles in a mesh.
another reason could be an object scale not being reset to {1, 1, 1}. If you have a scaled object in scene, this could be an issue, but I'm not quite sure whether is actually affects computation or not.
