# Rain Drops on Camera Lens #
Instructor - Pradeep Mamgain
In this tutorial we will create rain drops on the camera lenses using fusion particles. We will also use After Effects plugin CCRain and CC Vector Blur to simulate rain. However you can make rain using Fusion Tools only but I love these two plugins. CC Vector Blur tool gives rain more organic look.
#Final Output #
#Flow #
[A]. Download the project. Create a new comp and set Global Render Range to 300. Drop in a loader tool and load cloudyDay.jpg, Fig. a1. "deep shot" has copyrights under Creative Common License. Commercial use of this image is prohibited. Drop a BG node and merge loader1 with it, Fig.2. Now we will create rain first. Drop another BG tool. Go to Tools > AE > Simulation > CC Rain and add tool to the flow and attach it with CCRain node, Fig. a3. If you don't know how to use After Effects plugins in Fusion, read this KB Article.
[B]. Set rain options as shown in Fig. b1. These options are self explanatory. Now connect CC Vector Blur tool to CC Rain Tool. You can find this from Tools > AE > Blur Sharpen > CC Vector Blur. Set options as shown in Fig. b3. Now merge CC Vector blur tool with Merge1, Fig. b5.
[C]. Now this is time to add particles to the flow. First of all we need particles that will slide down. After that we will apply gravity. As you might have noticed when rain drops slides down there is a little turbulence in the motion. pTurbulance tool will serve that purpose for us. Next we need friction and at last refraction. So lets get started. Drop pEmitter and pRender tool. Set output mode to 2D for pRender tool. To any particle system to work we need these two nodes at the first place. Now add pDirectional Force, pTurbulence and pFriction tools between pEmitter and pRender tool, Fig. 1.
Options for pEmitter...
[D]. Options for pDirectionalForce, pTurbulence and pFriction tool...
[E]. Ok, when water drop comes down it leaves a trail behind and Fusion Trails tool is best suited for this. Go ahead and connect Trails tool to pRender tool and set options as shown in Fig. E1.
[F]. Now we have particles that pop up on the lens, slides down and leave a trail. Now we need refraction so that these drops would look like water drops. We will achieve this result using the displace tool. Drop in a Displace tool. connect Trails node to green FG node of displace tool and Merge2 node to orange BG node of displace tool.
[G]. We have completed particle generation process. Now we will color correct the BG image so that it looks like a cold rainy day. For this add a CC node between cloudyDay jpeg and merge1. Reduce master saturation down. Pull down master red gain and increase blue master gain. Now we will add a nice contrast curve. Drop ColorCurves tool after CC tool and adjust as shown in the pic.
[H].Finally we need depth of field effect. Drop a blur node between displace and merge2 tool. Jump to frame1 and set keyframe for Blur Size. Set value 10. Move to frame 150 and set a key for value 0. Go one frame back and set it to 10.
[I]. Now add a saver tool and render the comp.
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