To create an echo/fading trail, it makes sense to use the Block solver in simulated mode and blend it with the original. But frankly, I missed the information, and it was an unpleasant discovery for me: Block ignores subframes and only works with full frames, so we'll get strobing or need to set the frame rate tenfold, which is difficult to redo once the animation is set up in frames.
How do other specialists solve this problem? How do they get smooth trails with small pitch? With a separate file and cache? Or is there some trick?
Will there be an improvement for Block in H22? Substeps, for example?