I rescind my biased suggestion for a sketchy look and will remain more open to digital textures in the future. Thank you. I especially like the colors you chose for the center room but I'm not sure the green and purple really fit as they are. Perhaps they could use some toning down? Looking good! The elevation view would be interesting to see side by side, if you have time. Good idea. As an afterthought, the stairs (all of them) might benefit from some shading; it's difficult to tell what's up from down. Good luck with the challenge (though I have to agree with jfrazierjr).