docs(locale): expand hints for low order, thresholding and rescale

html/locale_en.json

@@ -789,7 +789,7 @@
     {"id":"","label":"List all locally available models","localized":"","hint":"","ui":"models_list_tab"},
     {"id":"","label":"Last Generate","localized":"","hint":""},
     {"id":"","label":"LUT","localized":"","hint":"Look-Up Table color grading section.<br>Upload a .cube LUT file to apply professional color grading presets.<br><br>LUTs remap colors according to a predefined 3D color transform, commonly used in film and photography for consistent color looks.","ui":"txt2img"},
-    {"id":"","label":"low order","localized":"","hint":"","ui":"txt2img"},
+    {"id":"","label":"low order","localized":"","hint":"Forces multistep solvers to fall back to a lower-order step during the last few denoising iterations.<br>Higher-order solvers can become numerically unstable as sigma approaches zero, so the lower-order tail produces a cleaner, more stable final image.<br><br>Applies only to multistep families (DPM++, UniPC, DEIS, SA Solver, DC Solver, ER-SDE). Single-step samplers such as DDIM, Euler, and Euler a ignore this option.<br><br>Recommended to leave on. Disabling can occasionally give slightly sharper output but risks artifacts on the final steps.<br><br>Enabled by default.","ui":"txt2img"},
     {"id":"","label":"LSC layer indices","localized":"","hint":"","ui":"txt2img"},
     {"id":"","label":"LSC fully qualified name","localized":"","hint":"","ui":"txt2img"},
     {"id":"","label":"LSC skip attention blocks","localized":"","hint":"","ui":"txt2img"},
@@ -1191,7 +1191,7 @@
     {"id":"","label":"Resize","localized":"","hint":"Image resizing, can be using fixed resolution on based on scale","ui":"settings_postprocessing"},
     {"id":"","label":"Rerefence models","localized":"","hint":"","ui":"settings_extra_networks"},
     {"id":"","label":"Replace model components","localized":"","hint":"","ui":"models_replace_tab"},
-    {"id":"","label":"rescale","localized":"","hint":"rescale betas with zero terminal snr","ui":"txt2img"},
+    {"id":"","label":"rescale","localized":"","hint":"Rescales the noise schedule so the final timestep starts from true pure noise (zero signal-to-noise ratio).<br>Standard SD schedules don't quite reach pure noise at the highest timestep, which biases generations toward medium brightness and limits dynamic range. Rescaling unlocks the full range of darks and brights.<br><br>Should only be enabled for models trained with zero-terminal-SNR or v-prediction. The most common are SDXL fine-tunes carrying a 'vpred' or 'v-prediction' tag in the name (e.g. NoobAI XL Vpred, Illustrious XL Vpred, Stability's CosXL), plus some noise-offset and Terminus-family checkpoints. Standard epsilon-prediction models such as base SDXL, Pony, and Animagine should be left as-is. Enabling on a mismatched model will shift colors and degrade quality.<br><br>Recommended to leave off unless your model documentation specifically calls for it.<br><br>Disabled by default.","ui":"txt2img"},
     {"id":"","label":"Resize seed from width","localized":"","hint":"Make an attempt to produce a picture similar to what would have been produced with same seed at specified resolution","ui":"txt2img"},
     {"id":"","label":"Resize seed from height","localized":"","hint":"Make an attempt to produce a picture similar to what would have been produced with same seed at specified resolution","ui":"txt2img"},
     {"id":"","label":"Refine guidance","localized":"","hint":"CFG scale used for refiner pass","ui":"txt2img"},
@@ -1456,7 +1456,7 @@
     {"id":"","label":"Timestep spacing","localized":"","hint":"Determines how timesteps are spaced across the diffusion process. Options:<br>- default: the model default<br>- leading: creates evenly spaced steps<br>- linspace: includes the first and last steps and evenly selects the remaining intermediate steps<br>- trailing: only includes the last step and evenly selects the remaining intermediate steps starting from the end","ui":"txt2img"},
     {"id":"","label":"Timesteps presets","localized":"","hint":"","ui":"txt2img"},
     {"id":"","label":"Timesteps override","localized":"","hint":"","ui":"txt2img"},
-    {"id":"","label":"thresholding","localized":"","hint":"","ui":"txt2img"},
+    {"id":"","label":"thresholding","localized":"","hint":"Enables dynamic thresholding. At each step the predicted clean image is clipped so its values stay within the model's trained range, which suppresses saturation and washed-out colors at high guidance.<br><br>Most useful for SD 1.x and SD 2.x at high CFG (>10). Generally not helpful for SDXL or flow-matching models, which already handle high CFG gracefully.<br><br>Applies to DPM++ family, UniPC, DDIM, DEIS, SA Solver, and DC Solver. Recommended to leave off unless you see saturation artifacts.<br><br>Disabled by default.","ui":"txt2img"},
     {"id":"","label":"Tint strength","localized":"","hint":"","ui":"txt2img"},
     {"id":"","label":"Texture tiling","localized":"","hint":"Apply seamless tiling to generated image so it can be used as a texture","ui":"txt2img"},
     {"id":"","label":"Threshold","localized":"","hint":"","ui":"script_apg"},