V67 IOR

V67 IOR (Refractive index) LoRA for Flux, Krea 2 and Z image Turbo.

Optical Precision, Material Reality

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Remember to put in the prompt (IOR:1.1) with the correct value of the material you want to make.

Overview

Step into the physics of light. This LoRA gives Flux precise control over the Index of Refraction (IOR) – the optical property that defines how light bends, reflects, and transmits through any material. From the subtle sheen of wet skin (IOR 1.42) to the explosive fire of a diamond (IOR 2.42), from the clarity of a wine glass (IOR 1.55) to the translucency of a lemon slice (IOR 1.35 + SSS) – V67 IOR unlocks physically plausible surfaces, reflections, and refractions.

Base Model: Flux (Schnell / Dev / Pro) Trigger Word: v67 Alternative Triggers: ior_ctrl , mat_ior

Why Flux + IOR Control?

Flux already handles lighting and texture exceptionally well. The V67 IOR LoRA teaches it to interpret numerical IOR values as specific optical behaviors – creating consistent, realistic materials across thousands of generations.

CapabilityWhy Flux ExcelsSpecular reflections Flux renders sharp vs. blurred highlights based on IOR and surface roughness Refraction & caustics Glass, water, and ice show correct light bending and focused light patterns Subsurface scattering Skin, citrus pulp, and honeycomb cells glow from within Wetness & moisture Droplets, tears, and wet skin maintain realistic edge refraction Dispersion Diamonds and crystals produce rainbow fire (IOR 2.42)

Signature Style Elements

Physically Accurate IOR Ranges Every material behaves according to its real-world refractive index – water 1.33, glass 1.5-1.6, diamond 2.42.

Wet Surface Realism Water droplets, sweat, tears, and rain create distinct edge highlights and internal refractions.

Glass & Transparency Wine glasses, crystals, and ice show correct background distortion, caustics, and rim lighting.

Organic Translucency Skin, fruit pulp, and wax honeycomb exhibit subsurface scattering – light enters, scatters, and exits softly.

High‐Gloss & Mirror Finishes Polished obsidian, mercury-like liquids, and acrylic plastics produce sharp, environment‐reflecting surfaces.

Layered Optical Effects Human hair (double IOR: 1.55 primary, 1.45 secondary), fingernails (1.53 + SSS), and irises (cornea 1.376 + lens 1.39).

Trigger Word & Usage

TriggerBest Use Case v67 Primary trigger – place near the beginning of your prompt, before IOR values ior_ctrl When you want to emphasize numerical IOR precision mat_ior Lighter touch, good for hybrid scenes with multiple materials

Recommendation: Use v67 once at the start of your prompt, then list subjects with their IOR values in parentheses. Example: v67, wine glass (IOR:1.55), water droplets (IOR:1.33), polished wood table (IOR:1.52)

Optimized Settings for Flux

ParameterFlux SchnellFlux Dev / Pro LoRA Weight0.55 – 0.750.65 – 0.85CFG Scale2.0 – 3.53.0 – 4.5Steps4 – 620 – 30SamplerEulerEuler, DPM++ 2M KarrasGuidance2.5 – 3.53.5 – 4.5

Starting Point Recommendations

GoalLoRA WeightCFGNotes Subtle IOR enhancement0.63.0Adds realism without dominatingBalanced material accuracy0.73.5Sweet spot for most promptsStrong optical effects0.84.0Intense caustics, reflections, wetness

20 Sample Prompts (Flux-Optimized)

These prompts cover the full IOR spectrum – from air (1.0) to diamond (2.42) – avoiding children and glass people.

1. Glass & Crystal (IOR 1.5 – 2.4)

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v67, a crystal wine glass filled with red wine (IOR:1.55), strong backlight, rainbow caustics on white tablecloth, sharp rim reflections, macro product shot

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v67, diamond ring on black velvet (IOR:2.42), brilliant fire dispersion, rainbow sparkles, white spotlight, jewelry macro photography

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v67, empty whiskey tumbler (IOR:1.52), ice cubes inside (IOR:1.31), condensation droplets on outer surface (IOR:1.33), dark bar background

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v67, crystal vase with fresh water (IOR:1.60 for crystal, 1.33 for water), fluted glass texture, sunlight through window, caustics on wall

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v67, magnifying glass (IOR:1.52) held over a printed map, distorted letters visible, brass frame, macro, shallow depth of field

2. Wet Skin & Moisture (IOR 1.33 – 1.45)

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v67, close-up of a 22-year-old woman's face, wet skin after swimming (IOR:1.42), water droplets on forehead and cheeks (IOR:1.33), dripping from chin, soft window light

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v67, human tear rolling down a cheek (IOR:1.33), wet specular highlight on the tear edge, skin IOR 1.4, macro, emotional expression

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v67, sweaty skin after workout (IOR:1.42), forehead and shoulders glistening, studio rim light, macro texture, realistic oil-water mix

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v67, wet lips (IOR:1.38) with a single water droplet on lower lip, soft focus background, natural lighting, beauty shot

3. Citrus, Fruit & Organic Translucency (IOR 1.35 + SSS)

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v67, slice of juicy lemon (IOR:1.35), light passing through moist pulp, subsurface scattering, backlit, yellow/orange translucency, fresh cut surface

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v67, orange segment (IOR:1.36) with visible juice vesicles, backlight creating soft glow, macro, water droplets on surface (IOR:1.33)

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v67, lime wedge on a glass rim (IOR:1.35), green translucent flesh, bright sunlight, cocktail setting, sharp shadows

4. Water, Ice & Liquids (IOR 1.31 – 1.36)

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v67, frozen lake surface at sunset (IOR:1.31), micro-surface scratches, bubbles trapped beneath the ice, cold blue tones, anisotropic reflections

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v67, water splash in a clear glass (IOR:1.33), high-speed photography, droplets suspended in air, bright flash, white background

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v67, honey dripping from a wooden dipper (IOR:1.36), viscous golden liquid, backlit amber glow, macro, warm tones

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v67, mercury-like liquid metal pool on a dark rock (IOR:2.0), mirror reflection of alien sky, high surface tension, no wetting

5. Obsidian, Minerals & Exotic Solids (IOR 1.8 – 2.0)

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v67, polished obsidian dragon scale (IOR:1.8), reflecting a distorted fiery environment, volcanic glass texture, conchoidal fracture edges, macro

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v67, faceted black onyx (IOR:1.65) on a leather surface, sharp specular highlights, dark background, luxury jewelry shot

6. Honeycomb & Beeswax (IOR ~1.49)

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v67, bees on honeycomb, translucent wax cells (IOR:1.49), fresh golden honey (IOR:1.36) filling some cells, backlit warm light, macro nature photography

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v67, close-up of honeycomb with liquid honey, light refracting through wax walls (IOR:1.49), soft bokeh, golden hour lighting

7. Human Eye – Multicolored Iris (IOR 1.376 – 1.39)

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v67, extreme macro shot of human iris, multicolored (blue, green, gold), wet corneal surface (IOR:1.376), crystalline lens beneath (IOR:1.39), bright specular catchlight, sharp radial fibers

8. Hair & Fingernails (Double IOR & SSS)

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v67, single strand of human hair (primary IOR 1.55, secondary IOR 1.45), backlit, cuticle scales visible, silky longitudinal specular streak, macro

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v67, human fingernail macro (surface IOR 1.53), wet-looking sharp highlight, soft subsurface scattering revealing pink nail bed, hard translucent keratin edge

9. Plastics & Acrylics (IOR 1.45 – 1.55)

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v67, acrylic cosmetic jar with pastel cream (IOR:1.49), translucent frosted finish, backlit with soft light, clean product render on white background

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v67, glossy plastic toy car (IOR:1.50), sharp reflections of a window, smooth curved surfaces, studio lighting

10. Atmosphere & Clouds (IOR 1.0)

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v67, cumulus clouds (IOR:1.0) at golden hour, soft volumetric lighting, no optical distortion, perfect vacuum reference, sky photography

Negative Prompt (Flux-Compatible)

Flux responds well to minimal negative prompting. This concise version works effectively:

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nsfw, low quality, worst quality, ugly, blurry, children, kid, baby, glass people, transparent human, glass statue of person, mannequin, plastic doll, text, watermark, signature

Note: Explicit exclusion of "glass people" and "children" protects against unwanted content.

Prompting Tips for Best Results with Flux

Do This:

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v67, [subject] with (IOR:x.xx), [material description], [lighting], [camera angle]

Example Good Prompt:

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v67, slice of juicy lemon (IOR:1.35), backlit translucent pulp, water droplets on rind (IOR:1.33), macro, bright sunlight

Keywords That Strengthen IOR Effects:

caustics , refraction , specular highlight , rim light

subsurface scattering , translucency , backlit

wet surface , droplet , condensation

polished , glossy , mirror-like

dispersion , rainbow flare (for IOR > 2.0)

Avoid:

Overloading with IOR values for every object (focus on 1-2 key materials)

Contradictory instructions (e.g., "matte diamond")

Extremely short prompts – Flux needs context for realistic refraction

Comparison: IOR Control Across Different Bases

AspectSD 1.5 / SDXLZ Image TurboFlux (This Model) Refraction accuracyModerateGoodExcellentCaustics renderingPoorFairSuperiorWet skin realismGoodVery GoodOutstandingGlass edge distortionModerateGoodExcellentDispersion (rainbow fire)FairGoodSuperiorSubsurface scatteringModerateGoodVery GoodLoRA weight range0.7-0.90.65-0.850.6-0.8

The Philosophy Behind V67 IOR

Index of Refraction is the hidden language of light. When you understand IOR, you understand why a diamond sparkles and water droplets magnify what’s behind them. This LoRA is not about copying photographs – it’s about giving Flux the optical vocabulary to invent new materials with physical plausibility.

"Light doesn't lie. With the right IOR, every reflection tells a truth about the surface."

This aesthetic appeals to those who appreciate:

Scientific accuracy in generative art

The beauty of authentic material behavior

Control over specular and refractive properties

Realism without sacrificing creativity

Training Details (For Reference)

Dataset: 60 high-quality images with precise IOR annotations (water, glass, diamond, skin, ice, honey, obsidian, plastics)

Trigger Integration: v67 embedded in all captions, followed by explicit (IOR:x.xx) tags

Training Resolution: 1024×1024 (Flux native)

Recommended Inference Resolution: 1024×1024 or 1536×1024 for wide scenes

Content Coverage: Wet skin (20%), Glass/Crystal (25%), Liquids/Ice (20%), Organics/Citrus/Honeycomb (15%), Gemstones/Minerals (10%), Hair/Nails/Eye (10%)

Quick Start Guide

Load Flux (Schnell, Dev, or Pro)

Load this LoRA at weight 0.65–0.75

Set CFG to 3.0–4.0

Write your prompt: start with v67 , then describe subject + IOR in parentheses

Add lighting, camera, quality tags

Generate and explore optical precision

Example Workflow:

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Model: Flux Dev LoRA: V67 IOR (weight 0.7) CFG: 3.5 Steps: 25 Sampler: Euler

Prompt: v67, diamond ring (IOR:2.42) on black velvet, brilliant fire dispersion, rainbow sparkles, macro jewelry photography, white spotlight Negative: nsfw, low quality, children, glass people, text, watermark

Curated Prompt Ideas by Category

Glass & Wine

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v67, a white wine glass (IOR:1.55) with condensation, pale wine inside, outdoor terrace sunset, golden rim light, elegant composition

Diamond & Gemstones

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v67, emerald cut diamond (IOR:2.42) with side baguettes, white gold setting, dark background, intense dispersion, luxury macro

Wet Skin & Sweat

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v67, portrait of a 22-year-old woman after rain, wet skin IOR 1.42, droplets on eyelashes IOR 1.33, soft overcast light, natural look

Citrus & Fruit

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v67, cross-section of a blood orange (IOR:1.36), deep red translucent flesh, backlit, water droplets on skin (IOR:1.33), macro food photography

Ice...