For petals, treat the UVs like a lattice. First, lay the UVs flat in a consistent grid, then snap the edge seams to the grid lines so every petal has the same texel density. Use a little “pin” on the center of each petal so the center of the texture stays at the same spot, keeping the iridescent effect aligned. Avoid auto‑wrap; it will scatter the hues and ruin the symmetry. After that, check the scale—make sure the distance between the seams is the same on all petals. A quick eyeball test: if you place a checkerboard on the texture, it should line up perfectly across every petal. Keep the math tight, the seams clean, and your garden will sparkle with precision.