cancelRender();
File file = chooser.getSelectedFile();
Flame newFlame = new Flame();
FlameRenderer newRenderer = new FlameRenderer(newFlame, prefs, newFlame.isBGTransparency(), false);
ResumedFlameRender resumedRender = newRenderer.resumeRenderFlame(file.getAbsolutePath());
threads = new RenderThreads(resumedRender.getThreads(), null);
Flame flame = currFlame = newRenderer.getFlame();
// setup size profile
{
int width = newRenderer.getRenderInfo().getImageWidth();