Hi, I'm trying to make smoke to use it with an earthquacke that i'm building. I'm using sprites and i've made a 100 smokelet tiff images, witch i'm cycling using expressions. It looks good and I have no problems with it's behaviour. My problem is with the rendering. When I render it with the batchrender engine the smoke comes out jittery and staccato like, but when I render it using the hardware renderbuffer engine it look nice. Am I doing anything wrong when rendering the smoke? Here is a link to the settings I use, and 2 Quicktime movies showing the different renders. https://www.backstagefilm.dk/problem/problem.html Thank You. Daniel