 So normal leaks just aren't enough and you need something heavier, not a problem. DT just means smoothness, the higher the value the more choppy the effect will be, the higher the spawn rate factor the more particles get created. Speed is how long the particle takes to get from the camera to the object, the higher the spread the more space between each particle. I personally don't use these sensitivity settings but be careful because when either one goes above zero the brush seems to stop working, the higher the opacity the more the fade, the higher the fade opacity random the more unpredictable the fade becomes, the higher fade size the more the ends of the particles shrink as they fade, the higher fade side random the more unpredictable the sides of the ends of each particles are as they fade. The less friction you have the more the particles will slide down the surface and if we continue down you'll see the global wind, which as usual determines the bias towards the directions the particles will fall. 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 and if you want to make each particle's velocity more random you can increase that over here and I'm still not really sure what the normal factor does so just let me know if you figure out. The bigger particle life the longer each particle will stay alive, the more random the life the less likely each particle is to die at the same time. The bigger the spread the more sporadic the direction each line becomes, the more turbulence power you have the less straight the lines become and the more turbulence scale the more the lines start to wave back and forth. Hope that helps and as always I hope you have a fantastic day and I'll see you around.