AAGLSLGLSLshadershaderisisaaspecializedspecializedprogramprogramexecutedexecutedononthetheGPUGPUtotoprocessprocessverticesverticesandandfragments.fragments.TheseTheseshadersshadersmanipulatemanipulategeometricgeometricdatadataandandpixelpixelpropertiespropertiestotogenerategeneratevisualvisualeffectseffectsandandrenderrenderlifelikelifelikegraphicsgraphicsininreal-timereal-timeapplications.applications.ByBydefiningdefininghowhowlightlightinteractsinteractswithwithsurfacessurfacesandanddeterminingdeterminingthethecolorcolorandandappearanceappearanceofofpixelspixelsononthethescreen,screen,GLSLGLSLshadersshadersarearefundamentalfundamentaltotomodernmoderngraphicsgraphicsprogramming,programming,enablingenablingthethecreationcreationofofimmersiveimmersiveandandrealisticrealisticvirtualvirtualenvironments.environments.