 So you want to make it rain. Not a problem. Now this particle is divided into two parts. First is how the particles interact before they touch the object and the second is how they interact after they touch the object. DT just means smoothness, the higher the value the more choppy the effect will be. Gravity direction X, Y and Z just determine what direction the particles will fall. X determines left and right, Y determines up and down and Z determines forwards and backwards. The bigger particle life the longer each particle will stay alive. Spawn angle X and Y change the direction and angle the particles start from. X makes the particles start from a more horizontal angle and Y pivots the rotation from the top. The higher spawn direction random the more random the particles will go all over the place. Spawn distance is how long the particle has to travel before it reaches its destination. The higher spawn rate factor the more particles get instantiated. The higher the spawn speed the faster the particles will travel. The more turbulence power you have the less straight the lines become. And the more turbulence scaled the more the lines start to wave back and forth. The less friction you have the more the particles will slide down the surface. Next we have global wind which of course does all the usual. X determines left and right, Y determines how much they resist gravity and Z determines forwards and backwards. Speaking of gravity if you want to control it directly you can make it weaker here or stronger like this. If you want it to look like the particle was tossed from a direction you can make it inherit velocity. And I believe this is dependent on the strokes of your mouse. The higher life max the longer the maximum life of each particle can be. The lower life min the shorter the life of each particle can be. I still haven't really noticed anything particular that the normal settings adjust but feel free to let me know in the comments down below if you do. And the higher the velocity the harder the particles splat when they touch the surface. Hope that helps and as always hope you have a fantastic day and I'll see you around.