Polymerized voxels by focusing ultrashort pulses varying wavelength over three-octaves wide range for femtosecond laser direct write 3D nanoprinting are studied. A possibility to use any color of spectrum from 500-nm-to-1200-nm with a controlled pulse width of 100-fs reveals delicate interplay of photo-physical mechanisms more than just two-photon absorption inducing localized photo-polymerization. None of the applied exposure conditions ensured significantly higher spatial definition than 200-nm in width using SZ2080TM photosensitized and pure materials, yet it allowed tuning the voxel aspect ratio and greatly influenced dynamic fabrication window determined by the resolution bridges method. An effective order of absorption, i.e., the nef-photon process of absorption, and exposure per pulse (energy, fluence, intensity) was assessed for ultra-short pulses varying wavelengths as it has the paramount influence to the established multi-photon polymerization (MPP) process. Here an evolution of the polymerised volume via different energy delivery mechanisms: one-/two-/three-photon absorption, avalanche ionization, thermal diffusion leading to controlled photo-polymerization are revealed. The results can be used to tailor polymerized volume for increasing the 3D nano-printing performance. A non-trivial energy deposition by X-photon absorption observed with an onset of a strong lateral size increase at the higher pulse energy at longer wavelengths and can be understood as due to reaching epsilon-near-zero conditions. Findings are valuable for the developing MPP technology to reduce the footprint size and increase its efficiency. Understanding mechanisms and appearance of λ-tunable commercial lasers are benefiting broad applications in advanced optical additive manufacturing areas of micro-optics, nano-photonic devices, meta-materials, and integrated-chips, and tissue engineering.