Background:
During check in, thumbnails are generated for both models and drawings, so far so good.
I use a mapkey to use only the custom check in routine with both models and viewable objects.
What I would like to control is how the thumbnail drawing images are generated. I don't have any issues with the model.
Issue:
When I use a blue background and check in, I get this in Windchill, both large and small thumbnails:
This is not so legible. It opens in Creo View like this also and is very difficult to read.
When I change to a white background:
This works and is legible in WC and Creo View.
So the question:
How do I configure the monochrome thumbnail creation without having users change or force to B/W background?
Thanks
ACCEPTED SOLUTION
Accepted Solutions
So a follow up.
I have shown Tom's Item 1 above.
I played around with item 2 to discover the true meaning, this is it pictorially to document it.
Within windchill, I searched for a part, selecting a drawing file that does not have an image
worth noting, in the second step (thumbnail window) the icon I chose was not an "open in creo view" selection but to create a rep.
The progression lead to a series of opening links. the final result after a period of time:
shows there is a failure somewhere, at least thru this method within our setup (so this door nail is thinking!)
the previous image shows there were successful jobs and these images do appear in WC and they were generated thru CP via the check in routine.
So it seems Tom, you are on the right track but now I am entering a really dark tunnel....
I think I might be wrong. I just did a custom check in with model and viewables. (I made sure the background in Creo was some funky color first.) The thumbnail was definitely created by my server side thumbnail generator, NOT by Creo. Since it was created server side, the "thumbnail.generator.backcolor" property did take effect.
So, it would appear that when publishing is done on the server side, the Creo View Adapters are creating the thumbnail during representation creation. When viewables are created as part of check in, thumbnail generation is handled by the stand-alone thumbnail generator. Either way, I'm betting the property mentioned will do what you want.
To answer your other question, this is a server side property that would need to be set by your site administrator. Most likely Windchill will need to be restarted for it to take effect.
More information:
As your reply at the bottom alluded to, this setting only controls the background color. It does not change the other system colors, specifically the one used for "Letter". More than likely your system color scheme with the blue background is setting letter to yellow and your system color scheme with the white background is setting the letter color to black.
If I change my letter color to yellow and then check in (model and viewables), this is what I see:
I'm trying to see if there is some way to override the user's system color settings during viewable generation, but I haven't found anything yet...
How do you do this Tom? Are you a God?
You compiled all this stuff so fast, and it's relevant! 
After hurting myself with all this learning, it seems I got a much better understanding of what is going on. Way better than searching the site.
A big thanks to all that chimed in too! Extremely helpful.
Hopefully we left a trail that may help others in the future.
We are hopefully upgrading our WC soon and I'll put my 2 cents in with regards to having a server side publisher activated but
until then, I guess I'll have to accept the user side publishing for now.
Maybe I'll create mapkeys for them to change back to their favorite scheme after I change it to what I need with the custom check in routine. Hmmm.....
Thanks again y'all
