Although, the player should have an option to allow paintings, even if it's "undwarvenly." Player freedom is important.
Another option is letting human immigrants with "painter" skill do it.
Personally, I am keen on having more objects that you need to purchase. But that's just my opinion.
Actually, I agree with you there, I would like to see more materials that you have to trade for and can't produce yourself. However, improving trade is a different topic. I think it's fair to suggest that Dwarf Fortress could have Painter's Workshop that dwarves don't have access to it, without modding.
You're right, (https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg/800px-Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg) is not very dwarfy, but (http://www.history.com/images/media/slideshow/egyptian-relief-sculpture-and-painting/ti-tomb-relief.jpg) is, IMO, and (http://paintingbyjag.com/sitebuildercontent/sitebuilderpictures/birds_chest.jpg) is debatable. And if you've got paint and paintable surfaces, you're going to have players asking, why can't we paint paintings?
There are a lot of art styles in the history of the world that would make more sense for dwarves than the Renaissance and Impressionist era paintings that usually leap to mind:
(http://www.historyforkids.net/images/EgyptianPainting1.jpg)(http://40.media.tumblr.com/tumblr_lt7yxkrKYn1r3bizmo1_1280.jpg)(https://s-media-cache-ak0.pinimg.com/236x/4c/a5/d2/4ca5d2157224e14fe273de7766b4f88a.jpg)(https://pianonecktie.files.wordpress.com/2010/11/retrophoto-nnm-ru_u-kuniyosh_8.jpg)(https://upload.wikimedia.org/wikipedia/commons/b/b5/Miraj_by_Sultan_Muhammad.jpg)(https://theninthwavestudio.files.wordpress.com/2013/07/annekorff_001.jpg)(http://www.mlahanas.de/Greeks/Minoan/Minoan3.jpg)(http://www.tattoosforyou.org/wp-content/uploads/2013/10/Viking-Dragon-Tattoos.jpg)(http://thumbs.dreamstime.com/z/aztec-mandala-colorful-art-based-calendar-32121705.jpg)(http://www.temperaworkshop.com/history/angelico-hell.jpg)(https://aqu52.files.wordpress.com/2013/06/600full-salvador-dali.jpg)(http://fantasy.mrugala.net/Frank%20Frazetta%20-%201996/Frank%20Frazetta%20-%20Calendrier%201996%20-%2010.jpg)(http://img-fan.theonering.net/rolozo/images/hildebrandt/ghavens.jpg)(http://orig09.deviantart.net/ccbb/f/2012/277/4/5/original_sonic_character_by_raseinn-d5gqudj.png)(https://photos.travelblog.org/Photos/3500/30424/f/164472-Maori-Art-0.jpg)(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSXQpvdeQfRGC0Q1m6CiarGeum88MjKXwYXwKHf2ozJ7v3aWV5ugQ)(http://www.kelticdesigns.com/Media/WebLogos/TreeofLifeByJenDelythN.gif)(http://c8.alamy.com/comp/B5PHB9/hindu-deity-parvarti-painted-statue-on-a-temple-gopuram-in-bangalore-B5PHB9.jpg)(http://www.ejumpcut.org/archive/jc52.2010/gadassikFlatlands/pix/skeldance.jpg)(http://www.people.vcu.edu/~djbromle/cartoon04/anne/joinordie.JPG)(http://images5.fanpop.com/image/photos/28900000/Tokyo-Babylon-tokyo-babylon-28958805-900-1485.jpg)
Yes I realize most of these styles are after 1400, but I'm going to argue that artistic style is not entirely dependent on technology. A lot of these are also not particularly dwarfy, but I just want to point out that art comes in infinite potential.
Egyptian, Thai, Art Deco, Kuniyoshi, Medieval Persian, Islamic, Minoan, Viking, Aztec, Medieval Europe, Dali, Frazetta, Hildebrandt, Sonic, Maori, Paleolithic, Celtic, India, Early Animation, American Political Cartoon, Anime
Okay, this was in my feed today and I love it. Sorry for melting your brains again.
http://zinzoa.deviantart.com/art/Cool-Sarah-544102907
(http://pre12.deviantart.net/9abf/th/pre/i/2015/185/d/d/cool_sarah_by_zinzoa-d8zy0hn.png)
I want to make it a little closer to DF style description this time.
This is a portrait of Sarah the goldfish-woman and a leather jacket by zinzoa. Sarah is striking a confident pose. Sarah is wearing the leather jacket. The artwork relates to the possession of a leather jacket by Sarah the goldfish-woman. The style is typical of the Anthro Movement. The colors are vibrant. The subject is highly stylized. The artwork is characterized by smooth lines and soft shading.
So by now we can start analyzing how the game would make these descriptions. Subject (sarah), author (zinzoa) and relationship (relates to) fields, as it has now. Color field (vibrant-somber). Style field (realistic-stylized). Maybe a mood field for some paintings that could pick whatever mood the painter had while painting (or experienced recently). Characterizing the linework and shading through text is a bit boring to read, I would skip that. "The style is typical of ..." might be irrelevant, but if the game generates artistic movements or trades art between civilizations it could add to the flair.
Them furries :o :o.
Anyway, I think that correlating a style to a geographic site and including why the artwork fits the style would allow for more of an 'art analysis'. The decorative "The artwork is characterized by..." could be omitted. If someone wants some individuality in the description, the style could go as follows:
"The style is reminiscent of the Deviant Artists due to the shading and warm colors, but has linework typical of Zinzoa."
With a bit more dwarf, though.
Something tells me that this thread will just become a showcase for other people's art and how best to dwarvenly describe said art.