Macha Posted July 17, 2009 Share Posted July 17, 2009 I want to create a firestorm hugging the surface of a planet, or any other object. I tried a setup with pyro and a field force but it goes all a bit crazy after a few frames. I thought I could contain the fiery atmosphere by surrounding it with a hollow spherical static object shell but that doesn't work at all. Any ideas on how to approach this? Quote Link to comment Share on other sites More sharing options...
sam.h Posted July 17, 2009 Share Posted July 17, 2009 Have you turned off laser scan on the static object? Did you know about the "show collision guide geometry" checkbox in static objects? Here is an example that should work ... sphere_collision.hipnc Quote Link to comment Share on other sites More sharing options...
Macha Posted July 17, 2009 Author Share Posted July 17, 2009 Laserscan! Thanks! Quote Link to comment Share on other sites More sharing options...
anim Posted July 17, 2009 Share Posted July 17, 2009 you can do it easier with just one solid sphere(not hollow) and checking the Invert Sign for collision volume sphere_collision2.hipnc Quote Link to comment Share on other sites More sharing options...
Macha Posted July 23, 2009 Author Share Posted July 23, 2009 I have some difficulty with this technique of containing the fire with a shell. After a few frames it fills up with smoke so that it becomes opaque. Any other ideas of how to do this? Quote Link to comment Share on other sites More sharing options...
essencevfx Posted July 23, 2009 Share Posted July 23, 2009 many things you could do. look at the shader, turn off smoke, then play with where your flames are mapped , you probably can get more flames out of the density field that's currently assigned to your smoke. Quote Link to comment Share on other sites More sharing options...
Macha Posted July 23, 2009 Author Share Posted July 23, 2009 I want a little bit of smoke. The problem is that because it is all contained by a static shell the smoke can't escape and becomes very very dense after a few frames of burning. I can surround it by a sink but then the whole point of "hugging the surface" is lost. If I could fade it somehow. I tried the Age parameter in the pyroshader but I can't control that effect and there's no doc help on it. Quote Link to comment Share on other sites More sharing options...
essencevfx Posted July 23, 2009 Share Posted July 23, 2009 I think a gas dissipate DOP is what your after then. Quote Link to comment Share on other sites More sharing options...
Macha Posted July 24, 2009 Author Share Posted July 24, 2009 I think a gas dissipate DOP is what your after then. Thanks Jeremy. This is the first time I use microsolvers and I think I'm doing something silly. Twiddling with the Evaporation either does nothing at all (0-0.999999) or gets rid of everything (1) gasdissipate.hipnc Quote Link to comment Share on other sites More sharing options...
essencevfx Posted July 25, 2009 Share Posted July 25, 2009 check at the bottom of the dissipate DOP , it remaps 0-1 field values to 1-0 by default, this might be your problem. Quote Link to comment Share on other sites More sharing options...
Macha Posted July 26, 2009 Author Share Posted July 26, 2009 Sorry, should have mentioned this before but remapping doesn't alleviate the problem. I thought that perhaps I used the microsolver wrongly. Quote Link to comment Share on other sites More sharing options...
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