Each shader is converted from a Shadertoy shader. Converted, parameterized and edited by Pema99. The original AcidSpiral.shader was created by hamoid. https://shadertoy.com/view/Xl2fzd Kaleidoscope.shader original was created by BigWIngs. https://www.shadertoy.com/view/tdcGDj The original Nebula.shader and Nebula_Screenspace.shader were created by guil. https://www.shadertoy.com/view/MtX3Ws The original Perspex.shader was created by Shane. https://www.shadertoy.com/view/Mld3Rn The original StarSpiral.shader was created by mahalis. https://www.shadertoy.com/view/3sKXRK The original Tesseract.shader was created by iq. https://www.shadertoy.com/view/4tVyWw The original TwinDragon.shader was created by Gijs. https://www.shadertoy.com/view/MtXSWj Shadertoy shaders are by default under CC-BY-NC-SA license : https://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US Shadertoy shaders allows remixing and redistribution of the material. It also stipulates that any redistribution must be under the same license. Therefore, Those shaders's license is also CC-BY-NC-SA. keiichiisozaki is a redistributor and has nothing to do with the shaders other than renaming Kaleidoscope_V2.shader to Kaleidoscope.shader, Nebula_Pema_V3_Screenspace.shader to Nebula_Screenspace.shader, Nebula_Pema_V3.shader to Nebula.shader, but if you have any questions, please contact me first. Shadertoy https://www.shadertoy.com/ Pema99 https://github.com/pema99