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Paint appearance is an important requirement for outer automobile panels. Since the last decade automotive manufactures start reducing paint thickness for environment issues. As a result, the surface roughening of steel substrate due to stamping becomes a critical factor for paint appearance. Although many research work has been conducted on surface roughening, limited research has been made concerning waviness and stamping conditions in pressshop. In this work the effect of strain mode on waviness evolution has been investigated. It is found that the strain mode, biaxial stretching or plane strain tension, has significant effect on waviness. In addition, the blank orientation relative to the major strain direction also affects the waviness after forming. This documented knowledge will help automotive to optimise waviness in the pressshop.