Yes, it really matters, I'd like to know what they're for so I know what I'm doing.. I zeroed out the last numbers (41,30 & 30) and it makes the trail totally different just by changing those last numbers that, as far as I'm concerned, shouldn't have any significance in the first place!!! So really you have no idea what you're talking about imo........ and that's why I requested a tutorial in the first place, because the first one sucked and this one does even worse of a job at tutoring us on how to use flame trails.. this tutorial is more like a wikipedia answer but worse because all of the informative content on the actual lines of code in item.dat are missing, and that's almost the most important part!