What I Look at First When a Mosaic Does Not Work

When a mosaic does not feel right, I start with the whole image before examining technique. I look at the largest value masses, proportions and major edges: where a figure meets the background, where a dark mass cuts into a lighter one or where the silhouette changes direction. A beautifully made surface, which I often strive for up close, can still produce a weak or unclear image.

I resist fixing small things too soon because small corrections rarely rescue weak larger relationships. You can make an eye beautifully and still have the head in the wrong place. You can make every gap neat and still have the value structure fall apart when you step across the room.

Before testing individual pieces, I try to name the trouble in terms of what the image does. Does the subject become too weak against its surroundings? Does a bright passage demand attention where I do not want it? A smaller or grayscale view may help me check the broad structure, but I do not need a long series of viewing tests before deciding where to look next.

Only then do I move closer and look at intervals, tessera direction, local edges and individual pieces that pull too much attention. Those things matter, but they are easy to blame because I can point at them. A larger relationship, such as whether one value mass overwhelms another or whether the eye keeps getting pulled away from the subject, can be harder to name even when it has much more effect on the image.

I also look for what is already working before I change anything. We have all fixed one area and then discovered that we weakened something better nearby. A useful examination has to tell me not only what might need changing, but what I should leave alone.

Technique comes later because the same visible effect can have several causes. A dark line might come from spacing, substrate, shadow, grout (God forbid!) or the glass itself. The useful question for me is, "What changes would actually change what I see?"