It is because you have a material (or multiple) that sit within the current Rhino file. When you save it and click “Yes”, it will embed the textures directly into the file. At this point, your file will increase in size to about whatever the number is stated.
If you click “No”, it will merely keep the reference positions of fhe texture files.
Whether textures/images are saved (embedded) in the file depends on the “Save textures” checkbox in the Save dialog window. If you don’t want them saved with the file, uncheck it. Then Rhino will only save the path to the image/texture. If you move it from there, Rhino won’t find it anymore.
If you do want to save the textures in the file but do not want the warning message every time, just check “In the future, don’t show me this dialog box” in the message window when it pops up.
Hi,
I see V5 had save textures NOT ticked.
V8 has them ticked,
so I now untick them.
no warning anymore.
if they are saved to the .3dm as well as exist as obj and jpg, its more storage used up.
If I move the obj folder then the texture will break. A risk I have taken in the past.