Install ComfyUI
git clone in the custom_nodes folder inside your ComfyUI installation or download as zip and unzip the contents to custom_nodes/ComfyUI_Fictiverse.
Start/restart ComfyUI

Nodes

Please check (akatz-ai/ComfyUI-Depthflow-Nodes) if you are here for 3D parallax

Essential Params + Expand : cfg, steps, sampler, scheduler, denoise in one node
Image Params + Expand : Size, ratio, orientation, hires and batch in one node Video Params + Expand : Size, ratio, orientation, frames and FPS in one node

If Image Valid : Select the second image if the first in not valid.
Is Valid : Check if image is valid.
None If Same Image : Return a tiny black image is two images are the same.

Add Margin With Color : Add margin on top or on the bottom, useful for image to video watermarks.