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Previs","\u002Fdocs\u002Fnodes\u002Fwind-previs","docs\u002Fnodes\u002Fwind-previs",{"title":579,"path":580,"stem":581},"Wrangle","\u002Fdocs\u002Fnodes\u002Fwrangle","docs\u002Fnodes\u002Fwrangle",{"id":583,"path":39,"stem":40,"extension":584,"title":38,"description":585,"body":586,"meta":777,"navigation":786,"seo":787,"sitemap":788},"7ecf5bb9-61ab-4863-b2a0-eb3a1367bd4c","md","Draw a tree's branches by hand, or bring in curves from SpeedTree, and pass them through Natsura with the Custom Module node so they can be grown on, decorated and reshaped like a grown tree. Experimental.",{"type":587,"value":588,"toc":768},"minimark",[589,596,599,613,618,625,629,632,648,651,654,658,672,675,678,687,690,693,697,705,708,711,715,718,723,726,729,734,737,739,743,761,765],[590,591,592],"note",{},[593,594,595],"p",{},"This page is still being worked on. More clips are coming soon.",[593,597,598],{},"This page draws a tree's main branches by hand, passes them through Natsura, and grows, decorates and reshapes the result like any grown tree.",[593,600,601,602,606,607,609,610,612],{},"You should have Natsura ",[603,604,605],"a",{"href":15},"installed",", with SideFX Labs, and have built ",[603,608,22],{"href":23},". ",[603,611,415],{"href":416}," covers the Custom Module node.",[614,615,617],"h2",{"id":616},"draw-the-branches","Draw the branches",[619,620,621],"ol",{},[622,623,624],"li",{},"Place a Skeleton node (Houdini's own) and press Enter in the viewport. Click to draw a joint chain, Shift-click to start a new chain, and press Enter to stop drawing. Each chain becomes a branch.",[626,627],"video-player",{"src":628},"https:\u002F\u002Fmedia.natsura.com\u002Fbf56b2ca-b9b2-4158-8ae9-03d3b658d7bd.mp4",[593,630,631],{},"Recorded in 0.7.2, with the nodes already placed.",[619,633,635],{"start":634},2,[622,636,637,638,642,643,647],{},"Wire the Skeleton into Custom Module ",[639,640,641],"span",{},"EXPERIMENTAL",", from the toolbar's Advanced menu. The width is read from ",[644,645,646],"code",{},"pscale"," (Use Existing Width). To set the thickness yourself, turn on Normalize Width: the widths are remapped into Width Min and Width Max.",[626,649],{"src":650},"https:\u002F\u002Fmedia.natsura.com\u002F600fca80-2311-41b5-86c8-e20f4116f226.mp4",[593,652,653],{},"Recorded in 0.7.2; the settings are the same in 0.7.3.",[614,655,657],{"id":656},"grow-on-the-drawing","Grow on the drawing",[619,659,660,669],{},[622,661,662,663,665,666,668],{},"Place a ",[603,664,411],{"href":412}," wired into a ",[603,667,537],{"href":538},". On the Grow, open Advanced, then Experimental, and set skeleton to the Custom Module (the clip under SpeedTree below shows this field). The Grow now carries the drawn branches.",[622,670,671],{},"Wire a second Grow into the first Grow's first input. It grows side branches from the drawn ones, with the usual growth controls.",[626,673],{"src":674},"https:\u002F\u002Fmedia.natsura.com\u002Ff60a568d-b5d5-40e7-bee1-76890af5aec3.mp4",[593,676,677],{},"Recorded in 0.7.2; the second Grow carries a Deflection Effector.",[619,679,681],{"start":680},3,[622,682,683,684,686],{},"Decorate the Grows as in Your First Tree. Here an Assembly Decoration is picked in the branch Grow's Decorations slot, and the leaves appear on the drawn tree. ",[603,685,98],{"href":103}," covers the options.",[626,688],{"src":689},"https:\u002F\u002Fmedia.natsura.com\u002Fcaa13a74-d3de-43fc-be66-fdf9d314996b.mp4",[593,691,692],{},"Recorded in 0.7.2.",[614,694,696],{"id":695},"reshape-with-natsura-shape","Reshape with Natsura Shape",[619,698,699],{},[622,700,701,702,704],{},"Choose Shape (Experimental) from the toolbar's Advanced menu and wire the Simulate into its first input. Press Add Shape Effector to add an effector, here a ",[603,703,407],{"href":408},", and set its Scale. Shape deforms the rig and its geometry after the fact, so the branches and leaves bend together without simulating again.",[626,706],{"src":707},"https:\u002F\u002Fmedia.natsura.com\u002Fe571b73d-2664-4b60-b0ae-253318d4f7f1.mp4",[593,709,710],{},"Recorded in 0.7.2; the Shape settings are the same in 0.7.3.",[614,712,714],{"id":713},"bring-in-curves-from-speedtree","Bring in curves from SpeedTree",[593,716,717],{},"Import Speedtree (Experimental), from the toolbar's Import menu, brings in the curves of a SpeedTree tree through Custom Module. Only the curves come in, not the branch geometry.",[619,719,720],{},[622,721,722],{},"Place Import Speedtree and set USD file to a tree exported from SpeedTree as USD. Convert Units and Fix Orientation are on by default.",[626,724],{"src":725},"https:\u002F\u002Fmedia.natsura.com\u002Fdfa54889-047d-4e91-b36e-60165cc45277.mp4",[593,727,728],{},"Recorded in 0.7.2; the USD file path is masked.",[619,730,731],{"start":634},[622,732,733],{},"Place a Grow wired into a Simulate, and set the Grow's skeleton (under Advanced, Experimental) to the Import Speedtree node. From here it works like a drawn tree: grow, decorate and reshape it.",[626,735],{"src":736},"https:\u002F\u002Fmedia.natsura.com\u002Fddf8e872-fb6b-4e8e-9f27-c0c48adc1752.mp4",[593,738,692],{},[614,740,742],{"id":741},"next","Next",[744,745,746,751,756],"ul",{},[622,747,748,750],{},[603,749,415],{"href":416}," covers Custom Module's settings.",[622,752,753,755],{},[603,754,52],{"href":53}," covers the other ways to pose a tree.",[622,757,758,760],{},[603,759,86],{"href":91}," covers what Shape's effectors can do.",[614,762,764],{"id":763},"status","Status",[593,766,767],{},"Custom Module, Import Speedtree and Natsura Shape are experimental, and their names and settings may change. Custom Module contains a SideFX Labs node, so it needs SideFX Labs installed.",{"title":769,"searchDepth":634,"depth":634,"links":770},"",[771,772,773,774,775,776],{"id":616,"depth":634,"text":617},{"id":656,"depth":634,"text":657},{"id":695,"depth":634,"text":696},{"id":713,"depth":634,"text":714},{"id":741,"depth":634,"text":742},{"id":763,"depth":634,"text":764},{"tags":778,"sidebar":785},[779,780,781,782,783,784],"natsura","tutorial","getting-started","drawing","speedtree","art-direction",{"label":38},true,{"title":38,"description":585},{"loc":39},[790,792],{"title":34,"path":35,"stem":36,"description":791},"Take a scanned trunk into Natsura and grow a tree from it: Import Highpoly, Create Graft Mesh, Bake, a Trunk Decoration on a Grow, and Grows that carry on from the scan's ends.",{"title":48,"path":49,"stem":50,"description":793},"How Natsura grows a plant. The graph you build is a grammar of core verbs that generates an Apex graph; the simulation compiles and evaluates that graph to grow a skeleton, decorate it, and produce endless variation from one recipe.",1791966636935]