Hi!
My 3D model is not working properly, the volumes look all mixed up when I zoom in, in all display modes.
I uninstalled and installed again Rhino, the problem is still there!
Please help me!
The most common issue is that your model is a long, long way from the origin.
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Can you provide a file with an example of your geometry? It could be a subset of the geometry in your images. You can click on the vertical arrow above where you type a post, or drag the file to the window where you type a post.
How far is the model from the World origin (not a local CPlane origin). Your model appears to be buildings, etc. Frequently such models are created using geo coordinates.
What are the setting in DocumentProperties > Units > Units and tolerances?
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Hi David!
Thank you for your help! 
How do I know where is my World origin??
I’m attaching a screenshot of my DocumentProperties! And my 3d model!
Capture3|519x499
Buildings.3dm (17.4 MB)
Hello - you are some distance from the World origin (Distance w0 and then click on a point in your model) but not really a huge distance. Here it shades correctly in place. Can you please run the
SystemInfo
command in Rhino and post the results?
-Pascal
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Lots of coincident surfaces in several parts of the model when cause patching colors and flashing when I zoom in and move the viewpoint on my system. Moving the objects to close to the origin did not eliminate.
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Hello Pascal and thank you for your help!
Here are the results:
Rhino 6 SR22 2020-1-28 (Rhino 6, 6.22.20028.13281, Git hash:master @ 379871ece695dc096e83826f08b429db8ca2e7f5)
License type: Evaluation, build 2020-01-28
License details: Stand-Alone
Expires on: 2020-05-20
Windows 10.0 SR0.0 or greater (Physical RAM: 16Gb)
Machine name: LAPTOP-49AJ3COE
Hybrid graphics system.
Primary display: Intel® UHD Graphics 630 (Intel) Memory: 1GB, Driver date: 9-28-2018 (M-D-Y).
Primary OpenGL: NVIDIA GeForce GTX 1050 (NVidia) Memory: 4GB, Driver date: 12-11-2018 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 417.35
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: None
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 12-11-2018
Driver Version: 25.21.14.1735
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 4 GB
Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.22.20028.13281
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.22.20028.13281
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.22.20028.13281
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.22.20028.13281
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
Hello - I would check the NVidia website for an update - at least to eliminate the driver as a possible contributing factor.
Open the Notifications panel (Panel menu) and look for a notification about drivers - double-click on that and follow along to get to a newer driver - download and install that and see how things work.
-Pascal
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I installed the updates… nothing changed 
Hi - Is it any better when you run ClearAllMeshes and then put the view in a shaded mode again?
Also, as @davidcockey said, there are coincident surfaces and those will always flash…
-wim
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Hi Wim! Thank you for your help!
I know the about the coincident surfaces but this doesn’t happen only there, it happens everywhere! I re-modeled my volumes and it still has the same problem… which is annoying because then it also doesn’t snap properly!
I just tried the ClearAllMeshes again but still no luck… it is very weird and annoying 
@wim - do you see any of the problems, apart from coincident surfaces, that the OP shows? Here it looks correct.
@ivarvaroussi - as a test, try selecting everything in your file and Copy/paste to a new empty file using the same units. Is that any different?
-Pascal
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@pascal - it’s a bit view-dependent (angle and zoom) but this is what I see:
(I don’t know why Discourse insists on cropping animated GIFs to 50x32 lately… - zipped in original size: 2020-02-21 DisplayIssue.zip (4.1 MB) )
It’s better in a shaded mode with less wires:
In Rendered mode you can see something fishy with the meshes:
Here’s one simple part in that file (left-most in gray) and, in red to the right of it, a new object that was made with Box > 3Pt over the existing object. Then, to the right, are the extracted render meshes of both. Somehow the original objects have some weird meshing.
ClearAllMeshes, copy, and paste into a new Rh7 document:
Any ideas?
-wim
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Hi guys!
I just pasted my model into a new document like you said, and cleared all meshes, and so far it looks like the problem has been solved!!!
Thank you so much for your help!!! 