All 640+ textures are part of a bigger asset called All In 1 Vfx Toolkit which also includes the most complete, optimized and easy to use VFX shader in the asset store, 55+ ready to use vfx prefabs, a texture editor, several texture creators, editor tools to speed up your workflow and more.
The textures are divided in 6 categories for a better organization and have proper names for improved searchability.
You can visualize all textures in this Interactive WebGL Browser Demo which is also included inside the asset.
If you purchase this asset you'll get a 15$ discount when buying All In 1 Vfx Toolkit and if you own All In 1 Vfx Toolkit you can download this one for free.