Stable Diffusion 3.5 Large: 6 Prompt Tests (1024px)

Stable Diffusion 3.5 Large is positioned as a stronger general-purpose text-to-image model with better prompt adherence and typography. This post runs six prompts that stress text, product lighting, composition control, portraits, 3D style, and surreal illustration.

Model link

https://wiro.ai/models/stabilityai/stable-diffusion-3-5-large

Test setup

Size: 1024×1024
Steps: 28
Guidance scale: 7.0
Scheduler: FlowMatchEulerDiscreteScheduler
Negative prompt: “bad quality, lowres, blurry, watermark”

Test 1: Typography on a sign

Storefront sign typography test — Prompt: High-resolution photo of a storefront sign on a brick wall. The sign is white with black lettering. The exact text must read: MORNING ROAST. Clean sans serif. Centered. Natural daylight.

This prompt checks if the model can keep letters clean and aligned. The overall sign look often lands well, but exact letter-perfect typography still needs a design tool for production work.

Test 2: Product photo + label text

Perfume bottle product photo test — Prompt: Studio product photo of a clear glass perfume bottle on a marble surface. The label has the exact text: AURORA NO. 7. Minimal design. Soft shadows. 85mm lens.

SD 3.5 Large does a nice job with glass, reflections, and soft studio lighting. Label placement looks plausible, but small text can drift or deform.

Test 3: Simple spatial control (three objects)

Kitchen counter with apple mug lemon — Prompt: Photoreal kitchen counter scene. Place a red apple on the left, a blue mug in the center, and a yellow lemon on the right. Soft window light. Sharp focus.

This is a fast way to see prompt adherence. If the colors or positions swap, add stronger anchors like “left edge” and “right edge” and reduce extra scene details.

Test 4: Portrait lighting control

Portrait with warm key light and cool rim light — Prompt: Photoreal close-up portrait of a man with curly hair and round glasses. Warm key light from left, cool rim light from right. Natural skin texture. 50mm lens.

The lighting direction callouts can work well when the prompt stays simple. For sharper realism, specify background bokeh and avoid conflicting style words.

Test 5: Isometric 3D render style

Isometric 3D desk scene — Prompt: Isometric 3D render of a small home office desk setup. Laptop, notebook, mug, desk lamp. Clean modern style. Soft global illumination.

Isometric prompts test composition discipline. The best results keep clean edges, consistent lighting, and a readable top-down angle.

Test 6: Surreal illustration (composition and mood)

Surreal whale floating over desert — Prompt: Surreal illustration of a giant whale floating above a calm desert. Long shadows. Pastel sky. Ultra-detailed. Cinematic composition.

This type of prompt suits SD 3.5 Large: a clear subject, strong mood, and simple scene geometry. It tends to deliver a cohesive image without overcomplicating the layout.

Quick takeaways

What was tested	What worked	What to watch
Typography	Convincing sign and label layouts	Exact letter-perfect text still hard
Lighting	Studio reflections and portrait lighting cues	Too many style words can confuse the result
Prompt adherence	Simple composition instructions often follow	Add stronger anchors when positions drift

Try it

Run Stable Diffusion 3.5 Large on Wiro