I'm working on cutting down the amount of filtering that I write - yay - but having a hard time with my current scene - boo.

My MC is hiding in a cart, which is rolling around. I've made it clear that see can see glimpses out of a crack in the side, and one in the floor of the cart. So she's seeing the road, trees, etc. But I've gotten to a point where I want to say, "Outside, she could just make out the wall of a wooden building."

I know filtering is to be avoided, but isn't the end of the world. Is it okay to filter in this instance?