Such effects are also clearly seen in Fig. , showing structures obtained when using a small spot separation write-spot array that was scanned to write "L" shaped motifs: increasing the incident light power results in the progressive formation of a multi-layered periodic structure along the Z axis. Although clearly distinct from the diffusion-related proximity effect illustrated in the previous and following examples, it also results in undesired polymerization peaking at the center of the generated motif, and should be taken into account in parallel fabrication especially when generating periodic structures with short inter-voxel distances.