I agree with you the pillars are unfortunate. The replacement tiles will stand out no matter how close they come to matching so you're better off making sure they are clearly different so the gray one is better. Putting busy mosaic tiles could look nice but will interrupt the flow between rooms which I'm guessing is your problem with the columns in the first place. You will need to create a dextrous solution to tying into the 2x4 wall on the left side but I think it can be done tastefully- maybe beveling it back once you get past he end of that wall.

Love blue tiles. Depending on how much sun and how hot your pool gets in the summer should dictate what color it is. We live in Arizona, so cool blues work best. Our neighbor has brown tile and a dark pebble tech pool. Looks like a swimming hole and gets really hot - 94% water in the summer. They obviously didn't think it through.

Hello There: Your home looks like it has some good bones and period features. No one has yet to comment on marrying subway tiles on lower walls, with tongue and groove cladding on upper walls of your space. I am thinking this finished look could well end up looking quite "busy." Lots of competing "grid" lines, etc. If I understand correctly, this space is actually, or ultimately will be, a bathroom. Perhaps you do not want a wood product on lower sections of the walls because of potential water damage, etc. That said, there are excellent paints, sealants, etc., that you could apply that would guard against this. If painting, using Zinsser Sealant as base coat is a good starting point. As another alternative, you could use much larger tiles on lower portion of walls, oriented vertically. I am thinking 12" x 18" (or 24") tiles. Of course, these are more challenging to install, given their greater size and therefore, weight. Despite this, if you have an excellent tiler, it can definitely be done. For example, you could choose glass tiles, either clear or coloured. Going even further, you could install glass panels to lower sections of walls. You could "back paint" them or not. You could apply paint or even wallpaper (with a wonderful design and colour way you'd likely never tire of) prior to installing glass panels. The wallpaper idea, especially if design is more curvilinear in nature, would not be competing with verticality of tongue and groove, but rather, would complement and enhance it. If beautiful wallpaper (or heck, even a mural or timeless design could be painted directly on walls) is applied and then covered with clear glass panels, the overall effect would be akin to that of an art installation. Naturally, glass panels would be considerably more expensive, but would provide a more seamless, less cluttered appearance. Should you like this idea, simply check what thickness of glass would work best, both for aesthetic and safety purposes. If you have a bit of time to shop around for best supplier and price point, you could well suss out a source that will not "break the bank!" :) To affix glass panels to the walls you want to use hardware that is anodized. As an idea, you could use anodized lug nuts that are usually used for automotive purposes. I just looked up "anodized lug nuts" and see they are available in wide array of wonderful, decorative colours. This hardware would be visibly holding your glass panels in permanent place, but they would be a small attractive design element, ultimately adding another layer of visual interest to your space. I believe glass panels would tie in very well with your great, textured/mottled glass panelled door and transom. Too, I think the overall look would achieve a really attractive marriage as various materials, along with period architectural features would "read:" old, new, and timeless. I realize this design concept may seem counterintuitive to you and/or others, but I can "see it" and think it could be just fab! All The Best, Sharon Black, interior designer and contractor

too slippery?