1. Workflow Overview

This workflow converts architectural floor plans into 3D-colored renderings with:

• Auto-Coloring: Identifies walls/windows/furniture via ControlNet.

• Material Generation: Adds wood/glass/tile textures.

• Lighting Simulation: Natural & artificial light shadows.

• 4K Upscaling: Uses UltimateSDUpscale for HD output.

Key Models:

• AD-Laozhuang 1.5: Architecture-specialized base model (license required).

• lwpm-Coloring LoRA: Optimizes color distribution (weight=0.6).

• ControlNet-lineart: Preserves original structure (weight=0.8).

2. Critical Nodes

Preprocessing:

1. ConstrainImage|pysssss

   • Resizes input to 1024x1024 (gray padding for aspect ratio).

2. CannyEdgePreprocessor

   • Extracts line art (thresholds 100/200) for ControlNet.

Generation Control:

• ControlNetApplyAdvanced:

  • Locks structure (end step=0.8) while allowing creative freedom.

• CLIPTextEncodeFlux:

  • Dual-text encoder (T5-XXL+CLIP-L) for complex prompts like:

    "Isometric view, (marble floor:1.3), (sunlight through curtains)"  

Post-Processing:

• UltimateSDUpscale:

  • 4K upscaling with R-ESRGAN_4x+ (tile size 512x512).

3. Workflow Stages

4. Inputs & Outputs

Input Requirements:

• Format: PNG/JPG (e.g., bft.png 1024x768 in example).

• Content Rules:

  • Pure line art (no text)

  • Closed walls, clear door/window positions

Outputs:

• Standard: 1024x768 colored render (bf prefix).

• HD: 2048x1536 resolution (高清bf prefix).

5. Usage Tips

1. Licensing:

   • AD-Laozhuang 1.5 requires commercial license.

2. VRAM:

   • Base generation: 8GB, 4K upscale: 16GB+ (disable UltimateSDUpscale if needed).

3. Troubleshooting:

   • Color bleed: Reduce LoRA weight (default 0.6 → 0.4).

   • Structure drift: Increase ControlNet end step (default 0.8 → 1.0).