DefaultQwen21VAE

Author: mcmonkey4eva

docs/Model Support.md

@@ -463,6 +463,7 @@ For upscaling with SD3, the `Refiner Do Tiling` parameter is highly recommended
 - Main model downloads are here: [Comfy-Org/Qwen-Image-2.1](<https://huggingface.co/Comfy-Org/Qwen-Image-2.1/tree/main/diffusion_models>)
 - It has a ch=64 scale=16 RGBA VAE, it will be downloaded automatically
     - Note that many models are scale=8, this is scale=16, meaning it has a larger 'snap' in resolution range, and needs to be set to 2048x2048 to generate the equivalent quality of what most models do at 1024x1024
+    - There is an unofficial 'texture fix' VAE that looks a bit better, download here [madebyollin/texture-fix-vae](<https://huggingface.co/madebyollin/texture-fix-vae-for-qwen-image-2.1/blob/main/texture_fix_vae_for_qwen_image_2.1_bf16.safetensors>). If you prefer it, select it in User Settings -> DefaultQwen21VAE.
 - **Parameters:**
     - **Prompt**: General VLM prompting
         - The preset for transparent images is `This is an RGBA image with transparency. {prompt}. The image has alpha channel and the background is transparent.` this is essentially required for proper transparent backgrounds.

src/BuiltinExtensions/ComfyUIBackend/WorkflowGeneratorModelSupport.cs

@@ -1396,7 +1396,7 @@ public void LoadClip3(string type, string modelA, string modelB, string modelC)
         else if (IsQwenImage21())
         {
             helpers.LoadClip("qwen_image", helpers.GetQwenImage21TextEncoder());
-            helpers.DoVaeLoader(null, T2IModelClassSorter.CompatQwenImage21, "qwen-image-2.1-vae");
+            helpers.DoVaeLoader(UserInput.SourceSession?.User?.Settings?.VAEs?.DefaultQwen21VAE, T2IModelClassSorter.CompatQwenImage21, "qwen-image-2.1-vae");
         }
         else if (IsQwenImage())
         {

src/Core/Settings.cs

@@ -586,6 +586,10 @@ public class VAEsData : AutoConfiguration
             [ManualSettingsOptions(Impl = null, Vals = ["None"])]
             public string DefaultQwenVAE = "None";
 
+            [ConfigComment("What VAE to use with Qwen Image 2.1 models by default.")]
+            [ManualSettingsOptions(Impl = null, Vals = ["None"])]
+            public string DefaultQwen21VAE = "None";
+
             [ConfigComment("What VAE to use with MiniMax H3 models by default (the video VAE, not audio).")]
             [ManualSettingsOptions(Impl = null, Vals = ["None"])]
             public string DefaultMiniMaxH3VAE = "None";