Emphasize Subject Texture
Abstract texture: rough surfaces and some side lighting creates ridges casts shadows creates an abstract landscape which casts shadows into the depressions.
Soft Lighting: soft light is often needed for more delicate subjects such as flowers otherwise the shadows maybe too strong. Here the jagged edges of the petals provide a repetitive texture throughout the image creating and delightful abstract.
Remember texture is more pronounced if light strikes it from the side or top. Be careful though side lighting can cast an unattractive shadow - if it seems too strong try reflecting some light back into shadows with white card to fill the shadows a bit.
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