Layer Adjustments (Informational)

(Note: The layer_adjust optimization mode requires specific setup and its integration with the current sd-mecha backend may need further review. This page primarily describes the parameters.)

The layer_adjustments component in optimization_guide.yaml allows for fine-tuning specific layers, primarily affecting color, contrast, and detail. These parameters are typically applied after a model is loaded, modifying its weights directly before generation.

When optimization_mode: layer_adjust is selected in config.yaml, the optimizer will tune these parameters based on the image scores.

Parameters

These parameters correspond to those used in tools like SuperMerger.

• Detail Adjustments: Applied multiplicatively to specific input/output blocks.
  • detail1: (IN Blocks - Detail/Noise) Affects early processing stages. Positive values decrease initial detail; negative values increase it. Recommended range: [-6, 6].
  • detail2: (OUT Blocks - Detail/Noise) Affects the final output layers. Positive values decrease output detail; negative values increase it. Recommended range: [-6, 6].
• Combined Adjustments: Applied additively to the model.diffusion_model.out.2 layer weights/biases.
  • detail3: (OUT2 Blocks - Detail/Noise) Further detail adjustment at a late stage. Recommended range: [-6, 6].
  • contrast: Influences overall contrast and detail. Recommended range: [-10, 10].
  • brightness: Affects overall brightness (Negative=Darker, Positive=Brighter). Recommended range: [-10, 10].
  • col1: Color balance (Negative=Cyan-ish, Positive=Red-ish). Recommended range: [-10, 10].
  • col2: Color balance (Negative=Magenta-ish, Positive=Green-ish). Recommended range: [-10, 10].
  • col3: Color balance (Negative=Yellow-ish, Positive=Blue-ish). Recommended range: [-10, 10].

Configuration in optimization_guide.yaml

components:
  - name: layer_adjustments
    strategy: all # Optimize all defined parameters individually
    # Or use 'select'/'group' if you only want to optimize specific ones
    # strategy: select
    # keys: [detail1, contrast, brightness]

You can set custom bounds for these parameters using the custom_bounds section in optimization_guide.yaml, targeting the parameter names (e.g., detail1: [-3, 3]).