02-26-2020, 12:49 PM
hey Tyson,
this is a rather hard to explain issue, so I´m posting it here instead of the facebook group...
I´m working on a blizzard shot, where a storm is raging around a character. As the Camera is orbiting around the character as well, I figured I could use a vortex sim to cover the whole camera path and not just have the wind come from one direction.
But I´m having troubles getting what I want and I´m wondering how you would tackle this, or if I´m overseeing something obvious.
As I also need a phoenix smoke sim, I thought the easiest way would be to use that as base with fluid force and birth fluid.
Unfortunately I couldn´t use tyVortex as a force in Phoenix, so I had to resort to max standard vortex force. I had to constantly birth new smoke, as the smoke would leave the grid after a while and I used open walls.
Maybe I should rethink that approach, the idea was to not have the smoke bunch up on the walls, but the smoke leaving the grid and the constant feeding of smoke are probably the cause of the issues described further down...
Anyway, I got a good enough results, that looked good in the viewport, but I can´t get an exact representation with tyFlow.
In the simplest version, adding Birth Fluid and Fluid Force, I get two issues:
1. As the phoenix grid has open walls, the particles expand to infinity, when they leave the grid.
2. I get "dead" particles, mostly in the middle of the vortex.
As I´m also having a slowmotion retimed part in the middle, in order to avoid any "popups" of newly birthed particles in that part, I wanted to birth all particles at once, instead of birthing them over time, as the smoke sim does.
But that lead to even more "dead" particles.
I´ve started playing with various workarounds, like adding an object bind to keep the particles inside the grid area, deleting them after they leave the area, adding curl force and slow op to the sim etc.
I also tried without any fluid sim, by mimicing the forces with tyvortex/max vortex force, but the vortex either kept expanding or shrinking too much, leading to holes in the middle or clumped particles in the middle.
I´m gonna keep exploring how to tweak it, but I´d love some input, maybe I´m just missing a step here...
this is a rather hard to explain issue, so I´m posting it here instead of the facebook group...
I´m working on a blizzard shot, where a storm is raging around a character. As the Camera is orbiting around the character as well, I figured I could use a vortex sim to cover the whole camera path and not just have the wind come from one direction.
But I´m having troubles getting what I want and I´m wondering how you would tackle this, or if I´m overseeing something obvious.
As I also need a phoenix smoke sim, I thought the easiest way would be to use that as base with fluid force and birth fluid.
Unfortunately I couldn´t use tyVortex as a force in Phoenix, so I had to resort to max standard vortex force. I had to constantly birth new smoke, as the smoke would leave the grid after a while and I used open walls.
Maybe I should rethink that approach, the idea was to not have the smoke bunch up on the walls, but the smoke leaving the grid and the constant feeding of smoke are probably the cause of the issues described further down...
Anyway, I got a good enough results, that looked good in the viewport, but I can´t get an exact representation with tyFlow.
In the simplest version, adding Birth Fluid and Fluid Force, I get two issues:
1. As the phoenix grid has open walls, the particles expand to infinity, when they leave the grid.
2. I get "dead" particles, mostly in the middle of the vortex.
As I´m also having a slowmotion retimed part in the middle, in order to avoid any "popups" of newly birthed particles in that part, I wanted to birth all particles at once, instead of birthing them over time, as the smoke sim does.
But that lead to even more "dead" particles.
I´ve started playing with various workarounds, like adding an object bind to keep the particles inside the grid area, deleting them after they leave the area, adding curl force and slow op to the sim etc.
I also tried without any fluid sim, by mimicing the forces with tyvortex/max vortex force, but the vortex either kept expanding or shrinking too much, leading to holes in the middle or clumped particles in the middle.
I´m gonna keep exploring how to tweak it, but I´d love some input, maybe I´m just missing a step here...