Three weeks on the same interior and I finally see what's wrong, which of course means taking the whole lower left back apart. The problem is my darks have no air in them. Every shadow is doing the same job, reading the same note, and it flattens the whole composition no matter how nice the light is on the table.

I know the old trick, I learned it twenty years ago. The shadow under the chair is not the same darkness as the one behind the curtain, even if your squint says they're equal. But somehow when I'm actually mixing I keep defaulting to one comfortable dark and then convincing myself the values differ enough. They don't. On the canvas they're all cousins.

What actually broke it for me: I stopped mixing and just laid in three separate darks neat, no blending, let them sit for a day. And suddenly the room had depth it never had while I was fussing. The lesson is embarrassing because I teach this. I say it out loud to students every week, trust the separate masses, don't unify too early. And then I go do the opposite on my own easel because I'm impatient and I want the painting to look finished sooner than it is.

Curious if anyone else has a particular habit they know better than and still commit. Not asking for advice, I know what to do. Just want to know I'm not alone in the stupidity.