Lighting in the 3d PDF is adjustable. Right click in the viewing window, Viewing Options -> Lighting Schemes, and try some different ones.
See if that helps.
Thanks Matt - check the right click - I should have tried that
That was helpful and should be adequate for what I need. View Option, Bright Lights is approximately as bright as I would want the solids to appear.
Next question - is there a way to set those preferences in either the SolidWorks "save as" option (apparrently not available for 3D PDF) or in Adobe (Edit / Preferences doesn't appear to have the 'default view settings for 3D objects, background colours etc). Editing them in the 3D PDF and then saving the PDF does not save the changes to the view settings - you would have to go back and adjust them in the new document, and each time you open up the document.
I'm guessing "no", but if you know of something that would be great.
What I'm trying to do is generate a 3D PDF file for marketing/sales types that aren't software savvy. Just something that is set up, ready to go without extra tweaking of adjusting lighting or anything.
Thanks again for your previous response - very useful.
I think you have maxed out my 3 PDF knowledge. You would think you could save your preferences somewhere, but I don't know how.
I am guessing that lighting in SW and lighting in Adobe are unrelated. Appearnces in SW may have an effect on how it looks in Adobe. I haven't played with it enough to know.
What happens if you print to pdf instead? Does the same thing happen?
I don't have Adobe Acrobat installed on this computer - so I can't chose ADobe as a printer and can't 'print' the PDF.
BTW thanks to you and Matt for offering some suggestions.
You are most welcome. Just trying to help.
You don't need Adobe Acrobat. The reader is just for viewing the files.
All you need is program that creates the pdf through the print driver.