First of all, any 2D or 3D image that doesn't depict a human or an animal is halal.
Concerning humans and animals, fiqh differs. I have published an overview on How can I make my drawings of humans halal?.
which is a part of the answer, showing different rulings.
I found a fatwa on a Salafiya site, allowing digital images in general as long as they are not materilised (I have to find it again in a review of this edit) but this is not commonly agreed in the Salafiya fiqh (and I personally don't agree, either).
It's certainly haram to depict images that are offensive, too (like naked images etc.)
You will certainly have to refuse to do things demanded from you if you are sure that it is against God's Will. But it remains difficult to really know whether a restriction is His Will or just a careful fiqh of a scholar who cannot exclude it that it is His Will.
You can also argue that it is better to change an image so that no Muslim thinks that it is offensive. That's a good argument ifever you are in doubt.
It will finally not be the most important issue when you stand before Him: Have faith in Him and do good deeds. And avoid telling lies when you are doing your job.