A.I. / LLM Good RENDERING Prompts

[para-CAD]

Post your best prompts.  Here's mine.

 

Make this 3D CAD model look photo-realistic.  Use sun and shadows in the morning. Place a cedar privacy fence behind this shed.  Behind the privacy fence show some new homes in this newer subdivision.  Add some light landscaping and maybe a mulch bed with shrubs or flowers.  Place a lone large mature Douglas Fir behind but near the privacy fence.  Do not modify the structure.  Keep the original colors of the model.

 

Make this 3D CAD model look photo-realistic.  Use sun and shadows in the morning. Place a cedar privacy fence behind this shed.  Behind the privacy fence show some new homes in this newer subdivision.  Add some light landscaping and maybe a mulch bed with shrubs or flowers.  Place a lone large mature Douglas Fir behind but near the privacy fence.  Do not modify the structure.  Change the colors to red with white trim.

 

 

 

Edited April 21 by para-CAD

[Gawdzira]

Which service are you using? The landscaping looks amazing for a few words instead of searching the library.

[mtldesigns]

My camera view placed into ChatGPT..  just playing.  I told it to place in the mountains (because that is where it's being built in NC), make landscape more realistic, add snow on the second draft.  You guys didn't know I invented a snow proof flag and pole, did ya!

 

@para-CAD

I've been meaning to get a second shed, thanks for the reminder.

[Michael_Gia]

1st image = Chief Standard view, all out of the box no PBR.

 

 

Gemini (free, no account) 

Prompt = "Increase photorealism of this image. Improve lighting, global illumination, reflections, shadows, and material texture resolution. Preserve the exact architecture, materials, proportions, windows, doors, and camera perspective. Do not modify the design in any way—only enhance realism and render quality. "

 

 

 

Chat GPT = make above rendering a winter scene but do not alter architecture or materials.

 

[para-CAD]

Michael....I was hoping you'd share your renders from your other thread.  

I hope we can build some great prompts to get high quality renders in seconds.

 

ChatGPT Images 2.0 just dropped.  

People are saying it has dethroned Nano Banana (Google Gemini)

We shall see.

 

I had some success with Grok, initially, but now it cranks out completely blurry images like I'm showing a home from Witness Protection.

[mtldesigns]

 A client emailed me and wondered what direction I was running with his house, since the ROW and easements were ridiculous on a small city street.  The model is a WIP, but I did a quick camera view, and a screen grab at street level, and had ChatGPT merge the two, and remove trees.  First pass was enough to convey the direction.

[winterdd]

Well I've used chat gpt to change exterior wall materials and colors and it seemed to work fine. I even deleted a curved stairwell in one of my plan files and asked AI to make a better curved staircase and it worked nicely. Today I put it to the test and I wouldn't say it is to scale but it did a great job when I told it to merge these two screen shots of the floor plan my client wants. I searched everywhere but failed to find the web link. AI couldn't even find it with all the info put in.

 

[ComputerMaster86]

Here is a project I am involved in currently.  It's in very early development but, I wondered tonight what Google Gemini / Nano Banana would output based on my original image.  Nothing special.

 

 

A.I. Prompt

 

Turn this rendered image into a photo realistic rendering. Do not change the structure. Keep integrity and colors of the original structure. Siding is suppose to be board and batten. Add a gravel driveway going up to the garage doors. Add some landscaping and make it a late afternoon sunny scene.

 

 

 

Edited Thursday at 06:39 AM by ComputerMaster86

[Michael_Gia]

10 hours ago, ComputerMaster86 said:

Nothing special.

I disagree.  

 

If I were a client and looking at your Chief standard render I would not want to live in that and I would already be starting to think that maybe I chose the wrong draftsman/designer/architect.

 

With Gemini render, I personally would love to live in that myself.  

 

I can see myself smoking a cigar on the front porch and enjoying the scenery.

 

What you did in, I'm guessing 20 seconds in Gemini?... Would not be possible in Chief and even with the help of TwinMotion would take hours and hours and never come close.

 

Nice job!

[winterdd]

17 hours ago, mtldesigns said:

 A client emailed me and wondered what direction I was running with his house, since the ROW and easements were ridiculous on a small city street.  The model is a WIP, but I did a quick camera view, and a screen grab at street level, and had ChatGPT merge the two, and remove trees.  First pass was enough to convey the direction.

I tried doing that last pic a few years and it looked pretty good. I took a google maps screenshot of the lot and use it as a backdrop in CA. You know, before AI was coming out.

[para-CAD]

I just asked Claude CoWork this:

 

Acting as an expert Al prompt creator, create a set of 3 different Al prompts to help me maximize photo-realistic 3D rendering of a 3D model developed in chief architect.

The prompts should refer to the location terrain type:

-beach

-woods

-forest

-mountains

-prairie

 

Also include using sunlight an shadows at different times of day and night.

 

Make sure to not change the architecture or structure of the original 3d model.

Allow for the change to colors, veneers, cladding, but the shape and size remains as in the original 3d model.

Allow for the addition of tasteful artifacts like a coiled garden hose of simple landscaping in flower beds.

Add sidewalks and paved concrete driveways if none are present in the original 3d model.

Include parameters that are relevant to consider when creating highly realistic looking renders of new homes.

 

[para-CAD]

Prompt 1 — The Environment-First Render

Best for: Presenting a design to a client who already has a specific lot or region in mind.

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PROMPT:

You are a photo-realistic architectural visualization specialist. I am providing a 3D model exported from Chief Architect. Your job is to render this model with maximum photorealism while strictly preserving the original architecture — all structural geometry, roof lines, wall positions, window/door placements, floor plans, and building dimensions must remain exactly as modeled. Do not add, remove, or relocate any architectural element such as windows, doors, dormers, gables, porches, or rooflines.

TERRAIN & SITE CONTEXT Place this home on a site matching one of the following terrain types (I will specify which):

• Beach: Sandy coastal lot with sea oats, dune grasses, slightly elevated grade, distant ocean horizon line. Soil is pale sand transitioning to sparse coastal vegetation. Include a natural shell or gravel path if no walkway exists in the model.
• Woods: Deciduous hardwood lot with dappled canopy light, leaf litter ground plane, mature oaks or maples at realistic spacing (no wall-of-trees effect). Understory should include ferns or low native shrubs.
• Forest: Dense conifer setting — pines, spruce, or fir — with needle-covered ground, filtered directional light, and visible tree trunks receding into atmospheric depth haze.
• Mountains: Sloped lot with exposed rock outcroppings, sparse alpine vegetation, distant ridge lines with atmospheric perspective, and clear high-altitude sky.
• Prairie: Flat open lot with native tall grasses, wildflower accents, wide-open sky with cumulus clouds, and a long, unobstructed horizon.

LIGHTING & TIME OF DAY Render using physically accurate sun positioning. I will specify one:

• Golden hour morning (7:00–8:00 AM): Low-angle warm light from the east, long soft shadows stretching west, warm color temperature (~3500K ambient).
• Midday (12:00 PM): Overhead sun, short hard shadows, neutral white light (~5500K), maximum surface detail visibility.
• Late afternoon (4:00–5:00 PM): Warm directional light from the west, medium-length shadows, enhanced material texture from raking light.
• Blue hour / dusk (7:30–8:30 PM): Interior lights glowing warm through windows, exterior in cool blue ambient light (~7000K), subtle landscape uplighting.
• Night (10:00 PM): Full darkness with all interior lights on, exterior illuminated by porch lights, landscape path lights, and soft moonlight fill. Stars visible if sky is shown.

MATERIALS & FINISHES (modifiable) You may adjust the following to enhance realism and curb appeal, but the underlying geometry stays fixed:

• Exterior cladding: siding profiles, stone veneer, brick veneer, board-and-batten, stucco, cedar shakes — apply with realistic texture scale, mortar lines, grain direction, and weathering.
• Paint and stain colors on all exterior surfaces.
• Roofing material appearance: asphalt shingle granularity, standing seam metal reflections, cedar shake texture, or slate.
• Window trim, fascia, and soffit colors.
• Garage door style and finish (panel pattern, window inserts, hardware).
• Front door color and hardware finish.

HARDSCAPE ADDITIONS If the original model does not include them, add:

• A poured concrete driveway with realistic broom-finish texture, control joints at 10-foot intervals, and slight surface imperfections.
• A concrete sidewalk (4 feet wide) from the driveway to the front entry, with a logical path and code-typical control joints.
• A front porch or stoop landing if one exists in the model — add a simple welcome mat.

LIFESTYLE ARTIFACTS Add the following small details to sell realism — place them naturally, not staged:

• A coiled garden hose on a wall-mounted hose reel near an exterior spigot.
• Simple landscaping in foundation beds: low evergreen shrubs (boxwood or juniper scale), seasonal flowers (petunias, impatiens, or mums depending on lighting season), and 2–3 inches of hardwood mulch.
• One or two mature shade trees in the yard at realistic scale (30–50 foot canopy height for hardwoods).
• A mailbox at the street if the view includes a front property line.
• Subtle tire marks or oil stain on the driveway for lived-in realism.

PHOTOREALISM PARAMETERS Apply the following to achieve maximum realism:

• Global illumination with accurate light bounce (radiosity).
• Physically based rendering (PBR) materials on all surfaces.
• Sub-surface scattering on foliage and thin curtains/shades visible through windows.
• Depth of field: slight background blur to simulate a 35mm–50mm architectural lens at f/5.6.
• Chromatic aberration and subtle lens vignette for photographic authenticity.
• Atmospheric perspective: distant objects slightly desaturated and hazy.
• Ground contact shadows with soft penumbra — no floating buildings.
• Reflection and refraction on glass surfaces showing environment and interior hints.
• Micro-displacement on stone, brick, and wood surfaces for tactile depth.
• Weathering: slight algae on north-facing surfaces, minor gutter patina, UV fade variation on sun-exposed siding.

My terrain is: [SPECIFY] My time of day is: [SPECIFY] My preferred exterior palette is: [SPECIFY or say "suggest one appropriate to the terrain"]

[para-CAD]

Prompt 2 — The Comparison Suite

Best for: Showing a client the same house across multiple settings and lighting conditions in a single session.

---

PROMPT:

You are generating a comparison set of photo-realistic architectural renders from a single Chief Architect 3D model. The building geometry is locked — every wall, roofline, window, door, overhang, and structural dimension must remain exactly as provided. Nothing is added or removed from the architecture itself.

Produce a render for each combination I request from the following matrix:

TERRAIN OPTIONS:

1. Beach — coastal sand lot, dune grasses, ocean horizon
2. Woods — deciduous hardwood canopy, leaf litter, dappled light
3. Forest — dense conifer, needle floor, filtered directional light
4. Mountains — sloped rocky lot, alpine vegetation, distant ridges
5. Prairie — flat open grassland, wildflowers, wide sky

LIGHTING OPTIONS: A. Sunrise golden hour (7 AM) — warm eastern low-angle light, long shadows B. High noon (12 PM) — overhead neutral light, short shadows, max detail C. Late afternoon (4:30 PM) — western raking light, warm tones, medium shadows D. Dusk / blue hour (8 PM) — cool exterior ambient, warm interior glow through windows E. Night (10 PM) — dark sky, interior lights on, exterior landscape and porch lighting, moonlight fill

FOR EVERY RENDER, APPLY THESE CONSTANTS:

Hardscape: If not present in the model, add a broom-finished concrete driveway with control joints and a 4-foot concrete sidewalk to the front door. Both should show realistic pour lines and slight surface wear.

Landscaping: Foundation beds with low evergreen shrubs, seasonal color flowers, and fresh hardwood mulch. Two appropriately scaled shade or ornamental trees in the yard. Grass type should match terrain and climate — Bermuda for beach, bluegrass for woods/prairie, fescue for mountains, etc.

Artifacts: Coiled garden hose near a spigot. Welcome mat at entry. Mailbox at property edge if frontage is visible. One subtle lived-in detail per render (a watering can, a pair of boots by the door, a garden flag, etc.).

Materials freedom: You may adjust exterior cladding type, paint/stain colors, roofing material appearance, trim colors, and garage/entry door finishes to best complement each terrain. The shape and size of every element stays identical — only the surface treatment changes.

PHOTOREALISM CHECKLIST (apply to all renders):

• PBR materials with accurate roughness, metallic, and normal maps
• Global illumination and accurate shadow mapping with soft penumbra
• Environment reflections on windows showing the specific terrain
• Depth of field simulating a 35mm architectural camera at f/4–f/8
• Atmospheric haze increasing with distance
• Subsurface scattering on foliage
• Micro-displacement on masonry, stone, and wood grain
• Realistic sky dome matching time of day (sun position, cloud cover, star field for night)
• Ground contact: no floating — show foundation-to-grade transition with proper grading
• Light spill from interior through windows at dusk and night scenes
• Slight lens effects: vignette, minimal chromatic aberration

MY REQUESTED COMBINATIONS: [LIST COMBINATIONS, e.g., "1A, 1D, 3C, 5B, 4E"]

For each render, label it clearly with the terrain and time code, and briefly note which exterior color palette and cladding you selected for that setting.

[para-CAD]

Prompt 3 — The Detail-Obsessed Single Hero Shot

Best for: Producing one stunning marketing image or portfolio piece.

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PROMPT:

You are a high-end architectural photographer working digitally. I am handing you a 3D model from Chief Architect. Your task is to produce a single hero render that could be mistaken for a real photograph in a luxury home builder's portfolio.

ABSOLUTE CONSTRAINT: The building's architecture is sacred. Every dimension, roof pitch, wall plane, window size and position, door placement, overhang depth, porch column, and structural detail remains exactly as modeled. You are the photographer, not the architect — you don't move walls.

WHAT YOU CONTROL:

Camera:

• Choose the most flattering exterior angle — typically a 3/4 front view showing both the facade and one side elevation, shot from approximately 5 feet above grade at 25–40mm focal length equivalent.
• Apply subtle depth of field (f/4 to f/8) with the sharpest plane on the front entry.
• Compose using the rule of thirds — place the roofline at the upper third line.
• Slight upward camera tilt is acceptable but avoid dramatic perspective distortion. Correct vertical lines to near-parallel as in real architectural photography.

Environment — I will specify my terrain:

• Beach / Woods / Forest / Mountains / Prairie
• Build the environment 360 degrees around the home for accurate reflections and ambient light. Include a realistic sky dome with clouds appropriate to the terrain and weather.

Time of day — I will specify, or choose the most dramatic option for my terrain:

• Morning golden hour / Midday / Late afternoon / Dusk-blue hour / Night
• Sun position must be physically accurate for the chosen time, terrain latitude, and a season I will specify (or default to late spring).

Exterior surfaces (adjust freely, architecture unchanged):

• Select a cladding combination that looks premium and regionally appropriate for the terrain. For example: cedar shakes + stone wainscot for mountains, smooth stucco + standing seam metal for beach, lap siding + brick accent for prairie.
• Choose a cohesive color palette: body color, trim color, accent color, roof color, front door pop color, and garage door tone.
• All materials must use PBR textures at real-world scale — I should be able to count individual shingle tabs, see wood grain direction, and notice mortar joint depth.

Hardscape (add if missing):

• Broom-finish concrete driveway with sawcut control joints at appropriate intervals. Driveway width should match garage door count (single: 10–12 feet, double: 18–20 feet, triple: 28–30 feet) with a gentle flare at the street.
• 4-foot concrete sidewalk from driveway to front entry with control joints every 4 feet.
• If the home has a porch, add appropriate-scale stone or concrete steps with a code-compliant handrail only if the rise exceeds 30 inches.

Landscaping & artifacts:

• Foundation planting beds (36–48 inches deep) with a front-to-back layering: groundcover or mulch at the edge, low flowering shrubs mid-bed, taller evergreen anchors at corners and flanking the entry.
• Two to three yard trees — species appropriate to the terrain — placed asymmetrically for natural composition.
• Lawn: healthy, freshly mowed appearance with visible mow stripes if grass type supports it.
• One coiled garden hose on a wall-mount reel, placed on a side elevation near a hose bib.
• Simple flower pots flanking the front door (terra cotta or dark glazed, with seasonal flowers).
• If the front entry has overhead cover, add a simple pendant or recessed can light glow (warm white, 2700K) for dusk/night shots.

REALISM PARAMETERS — NON-NEGOTIABLE:

• Ray-traced global illumination — every surface receives and bounces light accurately.
• Physically based sky model (Preetham or Hosek-Wilkie) matching time of day.
• Shadow quality: soft penumbra from area light source (sun), contact shadows at all object-to-ground interfaces.
• Glass: dual-surface reflection and refraction, visible interior hints (furniture silhouettes, warm light), slight green edge tint on double-pane glass.
• Weathering layer: subtle — not ruined, but lived-in. Think hairline caulk lines at trim joints, slight UV variation on south-facing siding, minor concrete spalling at driveway edges.
• Atmospheric depth: objects beyond 100 feet show slight desaturation and haze.
• Post-processing: color grade to match the mood (warm for golden hour, cool for dusk, neutral for midday). Subtle vignette. No HDR tonemapping artifacts.
• Final resolution: 4K minimum (3840×2160) at 300 DPI for print use.

MY SELECTIONS:

• Terrain: [SPECIFY]
• Time of day: [SPECIFY]
• Season: [SPECIFY]
• Exterior style preference: [SPECIFY or "your best recommendation for this terrain"]
• Camera angle preference: [SPECIFY or "most flattering 3/4 front"]

[para-CAD]

Avoid GROK

 

 

 

[para-CAD]

Nano Banana - exact same prompt