The magic happened.

She began with a grayscale image of a single, violent brushstroke, painted with a rough, chalky brush on a transparent layer. She saved it as a PSD. Then, she went to 3D > New Mesh from Grayscale > Plane .

She created a second layer, a vibrant red poppy petal. She placed the 3D mesh above it. Then, in the 3D panel, she changed the mesh’s material. She set the color to the red petal layer. She turned the Shine and Reflection way down, but cranked the Bump map to 100%—using her original grayscale stroke as the bump.