Vanishing decals

It appears that decals (or their file location is being lost) are being erased after running Purge.

Rhino 7 SR6 2021-5-7 (Rhino 7, 7.6.21127.19001, Git hash:master @ aec74c050f3ca28ab3cfd6882e9453a52366a9b7)
License type: Commercial, build 2021-05-07
License details: Cloud Zoo
Windows 10.0.19043 SR0.0 or greater (Physical RAM: 32Gb)
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2070 (NVidia) Memory: 8GB, Driver date: 5-13-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 466.47
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 5-13-2021
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V7\VRayForRhino.rhp “V-Ray for Rhino”
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.6.21127.19001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.6.21127.19001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.6.21127.19001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.6.21127.19001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.6.21127.19001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 7\Plug-ins\Calc.rhp “Calc”

Vray 5.10.04 update 1.3

what options are you choosing in the command line of the purge command?

Thank you for the very fast reply.
Purge command line: Everything yes, Bitmaps no (last option on the line).

Are the decals assigned, or just loaded? I’m testing here and purge only deletes materials that are not assigned.

Assigned, applied, located, sized, etc.
I don’t use any Rhino materials, only Vray.
I should have mentioned, it seems they disappear after closing Rhino, restarting Rhino (from W10 start menu icon, never double click Rhino file), open file, decals are still visible, then purge, they go away.
Thank you,

ah… ok, I’ll have to rely on folks with vray experience, I was just testing with rhino render.

Also, as a work around, I created a clean file with only the items decaled in it. Then I copy/paste into main working file after they disappear.
And they are disappearing from Rhino viewport.
When visible they render, I haven’t tried rendering when I can’t see them. There is a message in the decal box about no texture or not found, then lower it says click to assign or something like that

OK, can you give us a file and steps to reproduce? I can get that in front of the devs and hopefully we can help smooth this a bit-

Strange, I set up a test file, and decals remain in place after multiple purge, close, open, etc.
I can’t share the troubled file due to NDA.
Are the decals stored in any temp file, that would be deleted when turning computer off?
When my workload slows, I’ll try to replicate.
Thanks again for the fast action.


hard to say without seeing a file to replicate. If you can make a non-nda file that shows the issue-

let us know how we can be useful-