Hi
I wanna blend two different Pyro with different Voxel Size and scale with together , Even If I can fade out first one and fade in second one would be great !

Of course I tested it with Blend Shapes and Sequence Blend nodes with turning on Blend Voxel Data option , They are works great on simple Volumes such as ISO Offset node , but that seems they are only works perfectly on volumes with same voxel size and scale !

I think they use voxel size and scale of the first input for second input too and that's not what I need !

How I can blend two volumes or even make dissolve effect between them ?

thanks

About dissolving them (Fade out first one and Fade in second one ) , I think you can use Volume VOP.
Decrease Density for first volume and increase Density for second volume in the Volume VOP :?

I think we have node (or nodes) for fading , But I can't remember that !
But I made a Volume VOP method for dissolving two volumes for you , check attached file 8)

Specially thanks Sadjad.
Yes ,your project worked perfectly , But I like to know is there another way for doing that with Houdini nodes ?
your project working perfectly for dissolve effect , But how we can Blend two different volumes with together ?