I was just able to fix the particle density and intervals. Before *(note: The **first **image was "2020_Tilt_Brush_Brushes_with_Names.tilt" with original settings, the **second **image is "The Upside Down" with left being the .tilt (on original settings) and right being the .gltf (which should be correct), the **Third **image is when you fix image number one so, that the density is correct (the smoke would be a line you can (just lik in ur example above) but as you can see, its WAY to dense now on "The Upside Down" file (This is also an issue in your version (I've also tested it on "The Upside Down" which gave the result as the third image but you can also see it on the "Bubbles" and "Stars" brushes)*: