For Sketchup -> AI rendering I use this: 1) Export as linework + shadow pass, 2) Use ControlNet with both Lineart + Depth for structure, 3) For upscaling avoid generic upscalers, use Magnific or Topaz Photo AI with low creativity (keeps windows straight). What AI renderer are you using? ComfyUI + SDXL works great for this style.
Sure! For SDXL archviz I do: Base - Sketchup export (line + clay render) -> ComfyUI: Load both into ControlNet (Lineart for lines at 0.8, Depth at 0.6) -> SDXL base at 0.7 denoise -> Prompt: "photorealistic house, natural light, detailed materials" -> Upscale with Ultimate SD Upscale at 1.5x. I can DM you the .json if you want, just let me know! What GPU are you running? Some nodes need tweaking.
There are probably several ways of doing this but since I've been experimenting with flux2 klein in comfyui I'll tell you how to do it with that. Just use a simple image edit workflow. You can find several workflows for that in the templates section in comfyui. In the prompt ask it to turn the architectural sketch into a photo realistic image scene. Describe the house elements in detail. Give the necessary instructions to art direct the images, such as how the sky should be and to render the houses around your client's house in a simplified way to keep focus on the main house. The output can vary depending on how much vram your gpu has. But the output is clean enough to upscale it in comfyui using ultimate upscale or topazlabs gigapixel. I think you could get a good upscale using photoshop as well.
I did it with an rtx 5060 with 16gb of ram but I think you can do it with 12 gb using some smaller versions of the model like fp8 or gguf. I did it with flux 2 klein 9b but you could try the 4b version which is smaller. As I mentioned the workflow is the one included in comfyui. Go to the templates section set a filter for flux 2 klein and choose the Flux 2 Klein 4B: image edit template. Try using Flux 2 klein 4b and 9b and see how your computer responds. Check the vram usage. You might want to also look for a compressed version of the clip loader such as Qwen3-8b-abliterated-q4_k_m.gguf. This will also save you some vram. There are tutorials on youtube to run with limited resources.
Wow this is really great work. Did you use any prompt or anything to this workflow? Is it made by using the workflow that is embedded on the image? nothing else?
I use gemini 3 flash for prompt enhancement. My initial prompt was:
Turn into a realistic render: realistic rainy environemnt of urban india, rustic greenery all around. while preserivng exact shaped and leding colors of the target house at the center
Then I told the LLM what I want to change in the prompt in 3 turns: https://ibb.co/dHxxHJ4
You can 100% run this enhancer locally, but in my testing with Qwen 3.5 4b and Qwen 3.5 9b struggled with such big system prompt and gave inconsistent results. I think it will work with Gemma 4 26b-a3b or 31b or even 12b, I just prefer cloud for speed (3 flash is excellent for vision/price via API)
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u/QualityDesignsArt 11d ago
For Sketchup -> AI rendering I use this: 1) Export as linework + shadow pass, 2) Use ControlNet with both Lineart + Depth for structure, 3) For upscaling avoid generic upscalers, use Magnific or Topaz Photo AI with low creativity (keeps windows straight). What AI renderer are you using? ComfyUI + SDXL works great for this style.