Hey!
I worked a lot with Octane Render in Cinema 4D and i really missed the ‘store render buffer’ function in Blender version. So i tried to create a similar addon like that feature. (ok… honestly chatgpt helped a lot 
)
Description:
This Blender addon allows you to effortlessly compare a stored compositing state with the current state in a dynamic and visually interactive way. Ideal for artists who need precise control over their changes or want to showcase before-and-after effects in real-time.
Key Features:
- Dynamic State Comparison: Instantly visualize the differences between two compositing states with a draggable split line.
- Real-Time Compositor: Utilizes Blender’s real-time compositor for seamless and interactive adjustments.
- Customizable Controls: Adjust line thickness and color directly within the user interface.
- One-Click Storage and Reset: Save your initial state and revert effortlessly when needed.
- User-Friendly Interface: Intuitive panel available in the 3D Viewport’s Sidebar under the ‘Split’ category.
Note on Color Management:
For optimal results, set the View Transform in Color Management to Raw when using Octane or Standard for Cycles/Eevee. Using modes like Filmic or Agx may cause visible differences between the stored and live images. Perform your color management steps within the compositor itself, where the comparison will work flawlessly.
Requirements:
- Blender 4.1 or higher
Support
Feel free to reach out for support or feature.