Congratulations on solving the structure! Cryo-EM maps can look like amorphous blobs if lighting and opacity aren't tuned perfectly. The best approach is setting the electron density mesh to a semi-transparent surface while rendering the internal atomic ribbon or space-filling model in vivid, contrasting colors. For world-class examples of structural biology renders, take a look at Ella Maru Studio https://scientific-illustrations.com. Their scientific images and animations demonstrate how to balance map density contours with crisp molecular details. Learning from their lighting and shading techniques will make your cryo-EM structures look crisp, modern, and publication-ready.