Hello! Thank you for purchasing Crystal, I hope you like it ^^
As mentioned in the welcome message, I used Post-Processing FX (my other library) to demonstrate Bloom support with Crystal for emissive materials (since this is the only way to see it working), but this is not included in the source code, as it is a post-processing effect (screen-space effect), which is outside the purpose of Crystal, which is a light and shadow system in world-space.
Hope this helps :D