I’ve used the Flipbook nodes in Material Editor before, and it is able to use custom render texture as the texture input. But when I try it on VFX Editor, it doesn’t work.
Material Editor :
Visual Effect Graph :
@Wande
This is.a fun way to get materials into the VFX graph.
Unfortunately, I am seeing this same issue on my TTEH. I believe there is a bug in the way we handle Render Textures. We will take a deeper look Monday and see if there is a quick fix.
For the moment you may need to use a sprite sheet in vfx directly instead of through a render texture.
Ah I see, Thank You Frank!
Waiting for the updates! 
Sorry… my mistakes, It still doesn’t work in current version 
@Wande
We have a fix in progress for this issue. It won’t be available for several weeks unfortunately. 
I will keep you updated with any changes.
Hehe, I was too excited when EH updated last time. 
Thank You @EffectHouse_FrankH