Can I combine a 3D model with a reference image?

Answer

Short answer:

Yes. You can upload a view of your 3D model to define the structure and a separate reference image to define the style, lighting, or material palette. Rendair AI combines these inputs to generate a rendering that matches your exact geometry with the aesthetic of your reference.

Overview

In traditional rendering, achieving a specific "look" requires manually building lighting setups, creating custom textures, and post-processing in Photoshop. This process is often slow and rigid.

By combining a 3D model (which acts as the "structure") with a reference image (which acts as the "style"), you separate the two hardest parts of visualization. The AI reads the hard lines and depth of your model to ensure the building looks exactly as you designed it, while simultaneously pulling color tones, mood, and material qualities from a photo or rendering you admire.

This workflow is particularly powerful for architects who know exactly what they want to build but need to quickly explore how it could feel.

How it works

This process relies on an AI technique often referred to in the industry as "controlled generation." Instead of starting from random noise, the AI is constrained by the strict lines of your uploaded model.

1. Upload your 3D Base: You take a screenshot or export a simple view from SketchUp, Revit, Rhino, or Blender. This image locks the perspective and geometry.

2. Upload a Reference Image: You provide a second image, this could be a photograph of a specific material, a mood board image, or a previous high-quality render.

3. Adjust Influence: You set a "Creativity" slider.

• Low Creativity: The AI sticks strictly to your 3D model's colors and basic textures, using the reference only for subtle lighting.

• High Creativity: The AI takes more liberty, potentially adding details (like window frames or landscaping) that match the reference image's style but weren't explicitly modeled.

1. Generate: The platform maps the aesthetic data from the reference onto the geometric data of your model.

Capabilities

This workflow supports several critical tasks in the design process:

• Style Transfer: Apply the lighting and mood of a "golden hour" photograph to a plain white 3D massing model.

• Material Exploration: Test how your building form looks with "brutalist concrete" vs. "warm timber" simply by changing the reference image, without re-texturing the model.

• Site Context Blending: Use a photo of the actual site as a reference to ensure the lighting and color temperature of your render match the real-world location.

• Uniform Project Identity: Use the same reference image across multiple different 3D views to ensure every render in a presentation has a consistent visual signature.

Inputs and outputs

Inputs

• Structure: A JPG or PNG export of your 3D model (SketchUp, Revit, Rhino, etc.). White mode or "clay" renders often work best.

• Style: Any JPG or PNG image (photograph, painting, or render).

Outputs

• High-Resolution Renders: Photorealistic images that respect the original perspective and massing of your 3D input.

When to use this

• Early Concept Design: When you have a massing shape but haven't decided on materials yet.

• Client Presentations: When a client says, "I like the vibe of this photo," you can literally use that photo to render their project.

• Fixing Flat Renders: When you have a 3D render that looks "correct" but lifeless, you can re-run it with a high-quality reference to add atmosphere.

Limitations or notes

• Geometry is King: The AI will generally respect the geometry of your 3D model. If your model is very low-detail (just a box), the AI might hallucinate details to match the reference. If you want strict adherence, ensure your 3D model has enough detail (window openings, mullions, etc.).

• Conflicting Inputs: If your 3D model shows a daytime scene (bright shadows) but your reference image is a night shot, the AI may struggle to reconcile the two. Try to match the basic lighting direction of your 3D view to your reference for the best results.