Josh Clos posts a look at the standard method for creating Caption text over RealFlow previews, and then takes a look at a Python script (written by Mike Zugschwert) that will use RealFlow’s Show Preview Caption option, and can set the Caption automatically.
A tutorial explaining how to get caption text over your Realflow previews using the provided Python scriptJosh Clos - joshclos.com
The RealFlow Caption text will show all kinds of important information from the scene including settings for the emitters, Daemons and the scene file the preview was generate from, and it does this on a per-frame basis. Josh shows how to install PyQT and how to use the script for setting the Caption Text script.
If you want to check out the Preview with Caption script for RealFlow, you can find it here.