Here's a thing I faked in Photoshop today. One my clients is transitioning into a re-brand and doesn't have the physical items to photograph for their catalogue. They brought me in to build up these comps into realistic depictions. I love it – it's like digital painting... building shapes and textures, adjusting hues, highlights, and shadows.
Check below for my version, their OG file, an asset breakdown, and a closeup.
One valuable trick I learned from Sean at Grit back in the day: add noise to introduce a grainy texture to otherwise flat shapes, especially vector art.
1. Add a new layer, Edit>Fill with 50% Grey
2. Filter>Noise>Add Noise, make sure Gaussian and Monochromatic are selected, then adjust percentage to something barely fuzzy
3. Change the blending mode to Overlay and adjust the opacity as needed