This addon displays rendered thumbnails above shader nodes.

Also available on Gumroad.

• For each node, a preview thumbnail is rendered
• On edits, all affected nodes are automatically updated
• Previews are rendered in a background process to keep the Blender interface fluid and responsive
• No changes are made to the .blend, others without the addon can still open your scenes without problems
• High-resolution displays supported (works with Blender's resolution scale feature)

Caveats

• To show previews for packed images, the .blend file has to be saved to disk first, because they are loaded through linking from the .blend file
• Thumbnails of image sequences are not updated when changing frames
• IES nodes are currently not supported
• Some people report problems with the Vulkan backend. On my system with Windows 11, everything is working fine, but if you have problems please let me know and switch back to the OpenGL backend in the meantime

About Me

I am the author of the Blender addon for LuxCore. In 2014, I started working on Blender addons by contributing to the LuxRender addon. NodePreview is my second commercial addon after ImageNodePreview: https://blendermarket.com/products/image-node-preview