Texture files going missing

Hello,
C:\Users\XXXX\AppData\Local\Temp\McNeel\Rhino\V7\TextureCache*.jpg
These texture images are being cleared when I close Rhino and I don’t have “save textures” checked.
I always use Vray materials grass, wood, etc. or Vray generic.
I substituted "
*" since the list is long.
Appear as white surfaces in Rhino viewport, but they render correct in Vray or Vray viewport.
If I save file with “save textures” the file size is enormous, 50MB, same file with that off is 13MB.
Help please on what to do?
Thanks,
Glenn

Rhino 7 SR5 2021-4-10 (Rhino 7, 7.5.21100.03001, Git hash:master @ 2cd158094b595f6400479d7cbe511454b6149527)
License type: Commercial, build 2021-04-10
License details: Cloud Zoo

Windows 10.0.19042 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: 4-12-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 466.11
> 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: 4-12-2021
Driver Version: 27.21.14.6611
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” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.5.21100.3001
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” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.5.21100.3001
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”

Hi Glenn - is the problem that the objects do not show materials in the Rhino viewport?

-Pascal

HI Pascal,
Yes that is the problem.
But it is not all objects, only certain Vray materials like wood, grass, soil.
metal, and Generic Vray materials that I add bitmap or modify color are fine.
When I start Rhino and open a file that I didn’t “Save Textures” this happens.
Why would the material image go missing?
thanks,
Glenn
P.s. the other issue is why does saving textures make the file size so large, from 13MB (with save textures off) to 50MB with save textures on.
P.s.2 here are 3 screen grabs, sorry due to NDA I can’t display the rest of the model.


p.s.3 thanks for the fast reply & your assistance.

@pascal I posted at Vray Rhino as well, see below
Thanks,
Glenn
p.s. you might have missed my reply to your post on 4/23/21.
Rhino “Save Textures” & file size - Chaos Forums (chaosgroup.com)
“Can you try opening your files with the File > Open option in Rhino and see if textures get lost like that?
Testing on our end, we could only reproduce such an issue if the files were opened by double-clicking on the .3dm file. We’ve logged this under VRW-3205 so our developers can have a look, but meanwhile you can use the other option as a workaround. We’ll let you know when there are any updates on the matter.”