ComfyUI basic concepts
Nodes
4 min
what are nodes? each node does a specific job, like loading a model, generating an image, adjusting a parameter, or passing data along you connect nodes together to define how things run, step by step some nodes are core nodes, built into the system others, custom nodes, come from the wider community or are created for specific use cases you can use any mix of core and custom nodes in your workflow custom nodes usually need to be installed and maintained separately, but we're doing that for you each node can have inputs and/or outputs inputs are always on the left, and outputs on the right some nodes are interactive, like letting you upload a file or view a preview directly in the workflow node states nodes update their status as the workflow runs you can see this live by the colored border of the node normal default state running it's currently processing error something went wrong, often from a missing input or a bad connection missing the node is not installed or has missing dependancies connections to build a workflow, you connect the output of one node to the input of another this tells floyo how data should flow through your workflow for example, you can connect an image output to an image input the colour will tell you if you can connect the two nodes or not if two nodes aren't compatible, the connection won't work connections are drawn as lines between nodes in the workflow they give you a clear, visual map of how your workflow is structured
