Nicole Kennedy Design

Ideation, Creation & Everything In Between

Volcano Ash Plume, Part 6

In this image you can see the effects of the velocity on the grid, this shows the smoke animation and how the smoke will move away and thin from the top of the volcano. In order to make the velocity appear more in the scene view I need to use the trail length setting and turn this up to see more of the effects the vel* is having on the smoke. Screen Shot 2014-01-19 at 15.09.24In the series of images below in the slideshow you will see that the following parameters have all been promoted frequency, offset, amplitude, roughness and attenuation. This is done  by right clicking at the end of each of the settings and choosing the promote parameter button.

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In this image I am still selected on the volumevop1 node within the wind node and what I need to do here is within the z axis of the offset parameter I need to type in the following expression to slow things down a bit $FF/20Screen Shot 2014-01-19 at 15.12.07The video below shows a preview of the wind effect and how this wind will effect the smoke by the direction it is going and by how much of the volcano smoke is mainly affected by the wind.

The next stage in the tutorial is to create a multiply node this is done by using the tab menu in the network view and typing tab and putting the multiply field down as so. Screen Shot 2014-01-19 at 15.20.51I am then going to place down another parameter node in the same way as before tab type in parameter and place the parameter node into the network view.Screen Shot 2014-01-19 at 15.21.18Upon the creation of the new parameter node I want to change the name to windscale and the label to Wind Scale so that these inputs/outputs are displayed within the node.The next thing that I want to ensure that I do is connect the windscale value of the parm3 (parameter node) into the input of the multiply1 node. Screen Shot 2014-01-19 at 15.21.58When clicked on the volumevop1 node I need to increase the frequency of the x, y and z axis and increase each value from 0 – 0.66 as shown in the image below I did this by simply typing in the values.Screen Shot 2014-01-19 at 15.25.47The next stage is to create a Vector To Float node by using the tab menu and placing the node separately on the network view. Screen Shot 2014-01-19 at 15.26.16I then need to connect the BB value of the volumevopglobal1 node to the vec of the vectorfloat1 node. The next thing I do here is connect the middle value (fval2) to the input of the multiply1 node as well. Screen Shot 2014-01-19 at 15.27.19Now that I have connected up the nodes in the above network view which is within the volumevop1 node of the wind node this is now how my scene view looks.Screen Shot 2014-01-19 at 15.27.32I am then going to create a Ramp parameter node by using the tab menu and placing it on the network view in between the vectorfloat1 and the multiply1 node.Screen Shot 2014-01-19 at 15.28.11The ramp node was placed on the pathway between the vectorfloat1 and the multiply 1 node and has been connected from the fval2 of the the vectorfloat1 to the input of the ramp1 node. The ramp value of the ramp1 node is then connected to the input of the multiply1 node. Screen Shot 2014-01-19 at 15.28.31When I click on the ramp1 node the settings appear above the network view like in the images below I then need to edit a few settings. I need to use the drop down menu of the Ramp Type to change it from RGB Color Ramp to Spline Ramp (float) and in the next image I then change the default interpolation from linear to Catmull-Rom.

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This entry was posted on January 19, 2014 by in Creative Experimentation, Creative Strategies, Houdini, Special/Visual Effects and tagged .
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