Here is my 3D portrait of Heydar Aliyev (a former President of Azerbaijan).
Everything is hand-sculpted (no scans).
The model is done in ZBrush. All facial and eye details I did in HD geometry mode. Skin texturing in ZBrush and Mari. Suit texturing in Substance Painter. Hairs in Xgen. Rendering in Maya (Arnold), Post-production in Exposure.