hatrick Posted November 28, 2011 Share Posted November 28, 2011 (edited) Hello, I ve problems with a dust/smokesim, getting a fine enough resolution ore sim behavour. I have an object very close to the camera (covering the whole image area). The scene scale is setup correctly ... (the object is about 1/1/1 m, camera distance about 2 m) ... A friend who works with other sim tools mentioned that he would increase the scene scale for the solver?! (to get the behavour of a bigger scene without increasig the voxelres to much) ... Do i have to scale up the whole scene ore is there something like "physical size parameter" in the solver? Thank you HT Edited November 28, 2011 by hatrick Quote Link to comment Share on other sites More sharing options...
aghourab Posted November 28, 2011 Share Posted November 28, 2011 Hello, I ve problems with a dust/smokesim, getting a fine enough resolution ore sim behavour. I have an object very close to the camera (covering the whole image area). The scene scale is setup correctly ... (the object is about 1/1/1 m, camera distance about 2 m) ... A friend who works with other sim tools mentioned that he would increase the scene scale for the solver?! (to get the behavour of a bigger scene without increasig the voxelres to much) ... Do i have to scale up the whole scene ore is there something like "physical size parameter" in the solver? Thank you HT Had the same problem once. Its not really scene scale more so as the settings of your solver. I did a test once where I increased the scene scale some 12 times, and while I did notice some marginal improvement (maybe placebo?) it really came down to the solver settings. Have a look at the Bunkers response on the "Large Scale Explosion" thread. Some tips, play with advection speed time scales (effectively slowing down the sim), burn rate (some noise, giving natural burst like appearance), turbulence (Slow frequency offset, lower scale, gives the appearance of large scale sim. Turn this on and off to see what it looks like). No diffusion (tis your enemy, at-least from personal experience). Change advection type to BFECC (better results, less smudging). Perhaps post a file/video so people can have a look to see what your aiming for. Also, close up smoke is not fun:p (Render times?) Quote Link to comment Share on other sites More sharing options...
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