Magic power prop ideas for cosplay!
First 2 sets of photos: PETG thermoplastic heat-shaped. LED berry lights. Diffused light with tracing paper and sanding the plastic.
Tutorial: http://www.therpf.com/f9/magic-power-prop-tutorial-233092/
3rd set: Heat-shaped PETG strips to form a half-sphere structure to support organza, all attached together by tape. The most vivid sheen swirls in the bottom left photo were created by a torch.
4th set: I later found another organza (it was labelled ‘dance organza’) with a more vivid sheen than the type featured in the 3rd set of photos.