Are you trying to create multiple copies of the object, one after another, in a row, or are you trying to make a series of objects of iregular shape that can be placed next to each other like a stone wall? Both can be probably best done by creating a picture of the planform of the object outside of bryce, using something like photoshop, photopaint or paint shop pro. make a lattice object, click on the E, and then hit the "picture" radio button On the "editiong tools" Menu. This will then let you import the picture. You can obtain the desired shape by setting the null area to black. Click on the square in the upper corner of the terrain canvas to make a slider visible on the right side. Move the bottom of the slider up to remove the black areas from the shape of the lattice. I hope I understood your question, and I hope this helps!