just a simple test with emissive materials.
Textures from Textures.com (https://www.textures.com/)
Cubemap used: 'Miramax' by Jockum Skoglund (hipshot), link: https://opengameart.org/content/miram...
licensed under the creative commons CC BY 3.0 license: https://creativecommons.org/licenses/...