@djd711 the reason i made them to fade at direct angles is to prevent the “fins” from being too obvious. I may have overdone it so you can adjust it via Exponent and Fract parameters in M_NiagaraConeMat_Inst. Increase Exponent, decrease Fract.
About the errors you are getting, i’m not sure why that is happening. Are you using a rotating movement component inside the spotlight BP?