nigelgardiner Posted April 1, 2017 Share Posted April 1, 2017 Hi There Attached is a link to fizzy fluid, my attempt at creating a fluid which fizzes and foams, in this instance it's beer. It's very much a work in progress and low sample render, there are issues that need correcting and features to be added but I thought it was time to get some feedback. Simmed in Houdini 15, rendered in Houdini 15 , Mantra using the Phy Shader. thanks Nigel. https://vimeo.com/210682852 1 Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted April 23, 2017 Author Share Posted April 23, 2017 Hi Again Attached is a link to fizzy fluid mk2. A low sample render. Lots of issues, namely.. Shaders/Lighting/Render all need work. Bubble culling algorithm needs refining. The bubble/foam emitter is a place holder, need to think of a better way of placing it. The pour is also a place holder, needs refining. At this stage have mainly been concerned with flow of fluid in the glass, bubble paths, bubble to foam transition and the behaviour of the foam. Still a long way to go. https://vimeo.com/214421996 thanks Nigel. Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted July 30, 2017 Author Share Posted July 30, 2017 <iframe src="https://player.vimeo.com/video/227575401" width="1280" height="720" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted July 30, 2017 Author Share Posted July 30, 2017 Hi There Please find fizzy fluid mk3. thanks Nigel. not sure why i can't get the embed code to work sorry. https://vimeo.com/227575401 Quote Link to comment Share on other sites More sharing options...
Hamp Posted July 31, 2017 Share Posted July 31, 2017 Looks really nice! Wonder what it will look like with high samples + motion blur. Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted July 31, 2017 Author Share Posted July 31, 2017 Hi Hamp Thanks. There's a few things I still need to work on but I'll do a higher sample render and try some motion blur next render out maybe. cheers Nigel. Quote Link to comment Share on other sites More sharing options...
Hamp Posted August 2, 2017 Share Posted August 2, 2017 Hi Nigel! Cool! IMHO it's hard to gauge a full speed fluid sim without motion blur , it somehow always looks a bit like liquid glass - what you've got already looks really interesting. I do wonder, however if the velocities of the bubbles moving downwards on pour is a bit aggressive/linear. I would maybe expect them to move a bit more in an arc - if it makes any sense? Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted August 2, 2017 Author Share Posted August 2, 2017 Hi Hamp I'm a photographer, so for the last twenty years I've been trying to take the blur out of high speed fluid shots, I need to get my head around motion and blur. I'm sure you're right. Re the bubble velocities, yeah they are meant to be advected around inside the fluid surface with a general upward trend. The upward velocity was too large in proportion to the advect velocity and I think I don't have enough swirl in the vel field for the advection. I can't use the flip vel field to advect the bubbles as it doesn't really have the right motion so I build a smoke volume out of the flip surface each frame, move that around, and use that to generate a vel field for the bubble advection. It's possible I have an issue here as well, need to check that. cheers Nigel. Quote Link to comment Share on other sites More sharing options...
Hamp Posted August 2, 2017 Share Posted August 2, 2017 Hi again! I understand the whole reasoning around the motion blur, and I certainly were to agree if it was a slowmo shot. Of course it can also be an aestethic choice, even at full speed. My point was just that it's an easier sell as realism with motion blur , once again only imho. Nice to hear your reasoning with the bubbles! I'm sure you'll nail it I would also instictly think about a vel field akin to ink in water + upward buoyancy, sounds like a plausible track. If you advect the bubbles using the vel field, it's worth playing around with the different kinds of advection in the dop node, can give very different results. Best of luck! Quote Link to comment Share on other sites More sharing options...
Lunzium Posted May 2, 2018 Share Posted May 2, 2018 This looks fantastic. Would it be possible to see a hip file? Would be great to see how you go about doing this sort of thing (also I'm doing something similar for a uni project, and have no idea how to start it haha). Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted May 4, 2018 Author Share Posted May 4, 2018 Hi there Thanks, it has a lot of problems which I hope to be able to look at again soon. I'll dig up a hip file for it in the next day or so and post. cheers Nigel. Quote Link to comment Share on other sites More sharing options...
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