and theres more tutorials to come .brSo yes this is pretty basic but its important and many people ask me to make it.brFirst : know what causes lag to low end devices (ask low device end users to help you for this)brSecond : use a touch triggered toggle key in the beginning of your level and make it effect a free group for example 999brThird : Assign stuff that cause lag to said group (999 in the example)brFour (optional) : add text or other stuff that tells the player they are on low detail mode if they took the key ( or not if they didnt take it )brbrbr-brAlso this whole low detail thing is used first by funnygame as far as I know in his level Abyss because 2.0 was very laggy before 2.