I can't seem to figure out how to get a great picture of a tongue and groove living room that also has ceiling molding, off of one of my houzz ideabooks to show you that this style you like, can and does look good together. I picked the collaborate feature and put your user name in it to try and share this pic.

Yes.. I think you should paint, but... Why not lime wash the walls so you keep the look of timber and get the light, on trend Scandinavian aesthetic. I would go for a very light grey tint with a bright white ceiling and trim. Your fireplace and the deer would be great with this look: a rug and some white and grey cushions of differing textures would bring it all together. Coffee table candles would complete the Scandinavian look. Great room by the way!

What did you end up doing? I'm very curious.

Live in NZ near Christchurch. Am trying to find an alternative to tile as a wall covering on the walls OUTSIDE of the shower areas. These are already acrylic as did not want to clean grout lines. Has anyone used any of the panel products on the market for covering the whole room? Has anyone found any to replicate LARGE tiles. James Hardie has hardiglaze but the tiles are small . I really like T&G panelling, again seen A Hardie product but would like a narrower width tongue. Also I think up to ceiling will be a bit much........pHowever what height to end it? Are there less ornate dado rails available? The house is a new build and the fittings are contemporary. TIA for helping.