heydeun2 Posted July 20, 2018 Share Posted July 20, 2018 I'm working on a houdini pyro smoke scene and the problem is when I render it, the smoke comes out like it's boiling and also with layers ... I don't know why this happens... maybe because of the emitter or maybe render setting...? I couldn't find it on google as well... somebody help please Quote Link to comment Share on other sites More sharing options...
StepbyStepVFX Posted July 20, 2018 Share Posted July 20, 2018 41 minutes ago, heydeun2 said: I'm working on a houdini pyro smoke scene and the problem is when I render it, the smoke comes out like it's boiling and also with layers ... I don't know why this happens... maybe because of the emitter or maybe render setting...? I couldn't find it on google as well... somebody help please Hard to tell without more info, but usually : you can solve the « stairs » problem by increasing the substeps of your simulation. With small substeps, those stairs effect appear where the speed is high. I don’t what source you have used, but if it’s from particles or object, you can also increase the substeps, to smooth the emission and then avoid having those artifacts. The « boiling » : well, I think you’re talking about the smoke taking the form of a big smooth mushroom while getting high in the air ? You can limit this either by lowering the temperature of your your smoke, and/or decreasing the buoyancy of your pyro sim. The force that is applied to the smoke is buoyancy * (delta Temperature). A bit like an Archimede force but with difference of T between the fluid and its surrounding. By decreasing that, you limit the mushroom effect. Hope that helps 1 Quote Link to comment Share on other sites More sharing options...
heydeun2 Posted July 20, 2018 Author Share Posted July 20, 2018 31 minutes ago, StepbyStepVFX said: Hard to tell without more info, but usually : you can solve the « stairs » problem by increasing the substeps of your simulation. With small substeps, those stairs effect appear where the speed is high. I don’t what source you have used, but if it’s from particles or object, you can also increase the substeps, to smooth the emission and then avoid having those artifacts. The « boiling » : well, I think you’re talking about the smoke taking the form of a big smooth mushroom while getting high in the air ? You can limit this either by lowering the temperature of your your smoke, and/or decreasing the buoyancy of your pyro sim. The force that is applied to the smoke is buoyancy * (delta Temperature). A bit like an Archimede force but with difference of T between the fluid and its surrounding. By decreasing that, you limit the mushroom effect. Hope that helps Thanks for your advice even there wasn't much info. I think both of the problem might happened maybe because of substeps as you said. I'll have a try! Thank you very much! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.