For some areas of the model that carry a lot of detail, you may notice that when adding clay, the resulting brush stroke is blocky and jagged. To solve this, it is worth increasing the resolution of the layer. Go to the Layer menu. On the right-hand side, you can find the Increase Res option to increase the resolution of the selected layer. Every time this is done, the layer bounding box gets smaller, increasing the density of the voxel grid. Doing this in a physically large layer could result in it being cropped to fit inside the bounding box.