boxing in pipes

Hi all, I'm planning on boxing in the soil pipe that runs from behind the toilet underneath the floating cabinet, then I'll tile it with the blue wall tiles. It's easy enough to build a simple rectangular box the whole way, but when it gets to the toilet, the edge isn't straight. As far as I...

I recently moved in to an old pre-fab house with my partner and am looking to freshen up our built in wardrobes. As you can see from the pictures attached there’s a lot of pipe work either protruding or running through them. I’m a complete DIY novice so apologies in advance for any stupid...