Houdini tutorial - create peeling effect with pop grains

0:00 - intro 0:05 - Basic setup 1:31 - Creating "restlength" prim attrib (Convertline SOP) To maintain weight distance in "POP Grains" (in explicit constrains weight). 2:15 - Creating @pscale attrib to determine the radius of each particle in "POP Grains". 2:49 - Creating @mass attrib. 2:58 - Creating @Cd attrib and turn in black for determinate zero mass in "POP Net". 3:06 - Creating points "Group SOP" for determinate @mass attribute. 3:40 - Creating "Color SOP" to create color mask. 3.56 - Creating "POP Network" with basic dynamic nodes as "POP Source", POP object e.t.c. 4:09 - Setting emission type in "POP Source" node to all geometry. 4:12 - Setting particles impulse activation to expression such as $F==1 (create points on first frame only). 4:37 - Creating "POP Force" node. 4:48 - Renaming :) 5:19 - Creating "Geometry Wrangle" to set simple expression if statement type, expression where all points greater-than 0.5 color weight go to @mass ==1 if (@Cd Greater-than sign 0.5){ @mass =1; }else{ @mass= 0; } 6:02 - Creating @pscale controller 6:50 - Setting "POP Grains" 8:29 - Setting "Group SOP" animation to create "animated color mask" 9:24 - Creating a new branch control the "animated color mask" for particle simulation "POP Net" 10:12 - Creating a "POP VOP" node to read op:`opinputpath('../../../anim_mask/',0)` point attribute File @Cd from SOP dir. Setting vector @force.x component to @Cd 11:18 - Creating "POP Wind" 11:57 - @pscale settings. 12:21 - setting collider branch. 12:45 - setting original @P attrib with simple point function @P = point(1, 'P', @ptnum); 13:57 - Setting collider out null 14:07 - Creating "SOP Solver" 14:24 - Creating "Object Merge" in "SOP Solver" to merge "collider null" 14:53 - Creating "Attribute Transfer" to transferring v@force attribute to v@N with simple vex expression (AttribWrangle) v@force = normalized(@N) * -0.5; 17:26 - Creating "POP Torque ". 19:30 - Creating "Sort SOP" 22:01 - Render Setup Music composition by Kevin MacLeod. License: Creative Commons Attribution (https://creativecommons.org/licenses/by/4.0/). Original version: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100175. Artist: http://incompetech.com/