why when I render using karma CPU I get an empty output but when I render using Mantra render are works fine I have already tried following this video but won't work
A few things wrong in your setup. You can't use mantra materials to render with Karma. What's going on in your setup, however, is you have a mantra material on sparks, and a pyro bake on your fire. The pyro bake is only for the viewport, not final rendering. You'll have to add a volume shader to render a material for your flame.
There is a SideFx tutorial called "A Beautiful Game" which has a volume shader you can use. Visit the tutorial section of this site and pull down the files to take a look. Check out part #8.
Edited by Enivob - Jan. 5, 2024 09:23:45
Using Houdini Indie 20.0 Windows 11 64GB Ryzen 16 core. nVidia 3050RTX 8BG RAM.
I already have pyro shader & principled shader inside the material library also pyrobake is already skipped to Fire1 as you can see why is my render still empty?