Production Grade 4k Tiled Upscaler ( VRAM optimized ).

{

"1": { "class_type": "CheckpointLoaderSimple", "inputs": { "ckpt_name": "sd_xl_base_1.0.safetensors" } },

"2": { "class_type": "CLIPTextEncode", "inputs": { "text": "masterpiece, cinematic lighting, 8k resolution, highly detailed" } },

"3": { "class_type": "EmptyLatentImage", "inputs": { "width": 1024, "height": 1024, "batch_size": 1 } },

"4": { "class_type": "KSampler", "inputs": { "seed": 12345, "steps": 25, "cfg": 7.0, "denoise": 1.0, "model": ["1", 0], "positive": ["2", 0], "negative": ["5", 0], "latent_image": ["3", 0] } },

"5": { "class_type": "CLIPTextEncode", "inputs": { "text": "blurry, low quality, distorted, watermark" } },

"6": { "class_type": "UpscaleModelLoader", "inputs": { "model_name": "4x-UltraSharp.pth" } },

"7": { "class_type": "UltimateSDUpscale", "inputs": { "image": ["8", 0], "upscale_by": 2, "upscale_model": ["6", 0], "mode_type": "Chess", "tile_width": 512, "tile_height": 512, "mask_blur": 8, "upscale_workflow": "tiled" } },

"8": { "class_type": "VAEDecode", "inputs": { "samples": ["4", 0], "vae": ["1", 2] } },

"9": { "class_type": "SaveImage", "inputs": { "images": ["7", 0] } }

}