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The FLUX.1 [dev] Model is licensed by Black Forest Labs. Inc. under the FLUX.1 [dev] Non-Commercial License. Copyright Black Forest Labs. Inc.
IN NO EVENT SHALL BLACK FOREST LABS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH USE OF THIS MODEL.
Simple upscale using FLUX.2 [klein] 9B/4B. It works better with the 9B model.
By default, it's set to 2 steps for optimal consistency. If you want higher quality and strict fidelity to the original image isn't a priority, bump it up to 4 steps.
The workflow automatically scales your image up to 4K resolution. You can adjust this value in the corresponding node.