Few different methods for outpainting on SDXL:
Simple expansion (no additional prompting/action)
Full Background Replacement
Sketch to Render
INSTALL
Mile High Styler - https://civitai.com/models/119246/comfyuimilehighstyler
Rgthree - GitHub - rgthree/rgthree-comfy
IP Adapter Plus - GitHub - cubiq/ComfyUI_IPAdapter_plus
Impact Pack - GitHub - ltdrdata/ComfyUI-Impact-Pack
Use Everywhere - GitHub - chrisgoringe/cg-use-everywhere
ComfyRoll Studio - GitHub - Suzie1/ComfyUI_Comfyroll_CustomNodes: Custom nodes for SDXL and SD1.5 including Multi-ControlNet, LoRA, Aspect Ratio, Process Switches, and many more nodes.
Efficiency Nodes - GitHub - jags111/efficiency-nodes-comfyui: A collection of ComfyUI custom nodes.- Awesome smart way to work with nodes!
WAS Node Suite - GitHub - WASasquatch/was-node-suite-comfyui: An extensive node suite for ComfyUI with over 190 new nodes
Canvas - GitHub - Lerc/canvas_tab: ComfyUI canvas editor page
MODELS NEEDED
LCM LORA - https://civitai.com/models/195519?modelVersionId=219782
Yolov8m-seg.pt - https://docs.ultralytics.com/tasks/segment/
Clip Vision - https://civitai.com/models/133362/imageblender-includes-clip-vision-model
IP Adapter - GitHub - cubiq/ComfyUI_IPAdapter_plus
YouTube Tutorial