Selective Laser Melting (SLM) of three dimensional multi-layer model is being numerically investigated using finite element method with academic ANSYS software. The temperature distribution and melt pool formation with underlying solid base, support structure and loose powder is investigated in a single scan track. The results illustrate that the melt pool depth is deepest with the loose powder base but the regions adjacent to solid surface reduces the pool depth due to improved heat dissipation. Moreover, the liquid penetration increases with the layer addition and its intensity is dependent on input specific energy. The study suggests the selection of lower specific energy in the initial layers while designing overhang surfaces, clearance etc. to prevent excess powder melting beyond the layer thickness to achieve smooth surface.