12th July 2020
![](https://static.wixstatic.com/media/9402fd_49feef1fb6114b05856eafca3de85a91~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_49feef1fb6114b05856eafca3de85a91~mv2.jpg)
This is an old piece of work from 3 years ago that I decided to pick up & revive it with better visual quality.
The Siren Head model was made years go & I decided to put it to some good use with this Houdini Vfx piece.
The simple idea is simply to showcase a slightly more creative & more complex grain fx simulation in Houdini.
Houdini Vfx break-down video
simple break-down video preview - Houdini Vfx (vid above)
Left - rendered simulation
Right - AO pass & vellum grains constraint clusters visualization
Turn-around break-down video preview - Houdini Vfx (vid above)
Left - rendered simulation
Right - vellum grains constraint clusters visualization
Visualization break-down video preview - Houdini Vfx (vid above)
Left - layer 1 fx simulation driven by rising forces
Mid- switched to custom suction forces
Right - layer 2 fx grains transformation & falling apart simulation
Siren head model preview
![](https://static.wixstatic.com/media/9402fd_f0afbc99237342b8a9b0e62156e24579~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_f0afbc99237342b8a9b0e62156e24579~mv2.jpg)
Siren head model preview - Marmoset render (img above)
![](https://static.wixstatic.com/media/9402fd_f3426c6029204327af9dbf77f5d59342~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_f3426c6029204327af9dbf77f5d59342~mv2.jpg)
Siren head model preview - Marmoset wire-frame render (img above)
![](https://static.wixstatic.com/media/9402fd_a3b808b990b24c708996fd9f81436259~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_a3b808b990b24c708996fd9f81436259~mv2.jpg)
Body close up model preview - Marmoset render (img above)
![](https://static.wixstatic.com/media/9402fd_d6b4449e3df44468b6290435d2e0ff89~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_d6b4449e3df44468b6290435d2e0ff89~mv2.jpg)
Body close up model preview - Marmoset wire-frame render (img above)
![](https://static.wixstatic.com/media/9402fd_95a9485d3db94cfda11c0f7a09398056~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_95a9485d3db94cfda11c0f7a09398056~mv2.jpg)
Upper body model preview - Marmoset render (img above)
![](https://static.wixstatic.com/media/9402fd_61f3019f7fa44749a1826eab8055cebc~mv2.jpg/v1/fill/w_980,h_551,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9402fd_61f3019f7fa44749a1826eab8055cebc~mv2.jpg)
Upper body model preview - Marmoset wire-frame render (img above)
3D model mainly sculpted & Zremesh in Zbrush
Model then imported to Houdini for semi-procedural UV unwrap, rigged & animated for vfx stage
Texture in Substance Painter
Material & renders done using Redshift in Houdini
Model previews prep & rendered in Marmoset
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