Writing Prompts for AI Decal Generation

When no reference images are available, prompt texting becomes essential. ComfyUI uses both positive and negative prompts to guide the AI in generating the desired decals.

Positive Prompt: Specifies the decal features or details to emphasize, such as “vintage logo,” “metallic badge,” or “bright enamel colors". Use parentheses () in Stable Diffusion to weight specific features.

For stronger emphasis, use (word:1.3).
For weaker emphasis, use (word:0.8).

You can provide a reference image of the desired output and instruct the LLM to generate a Stable Diffusion 1.5 prompt based on the image, keeping it under 30 words. Refer to the key principles in the table below to ensure clarity, consistency, and high-quality AI-generated images.

Guideline	Instructions / Examples
Single Subject	Focus on a single subject. Each prompt should describe only one patch, one badge, or one illustration. Avoid combining multiple unrelated elements to ensure clean asset generation and consistent training results.
“What It Is” + View	Start with “What It Is” + “Angle of View”. A rectangular embroidered patch, top-down Front view of a brushed metal nameplate, no angle Flat graffiti-style lettering graphic
Text in Quotes	Enclose all text in quotation marks. letters "USA" text "Aaron \| Product Manager" arched text "CALIFORNIA EST 90"
Style Keywords	Use style / design keywords, not narratives. collegiate style vintage outdoor brand style classic American advertisement style vintage speed shop apparel graphic style
Colors	Keep color descriptions simple and direct. red / white / blue palette three colors: red, black, tan two colors: deep navy, cream
Materials & Craft Details	Specify concrete materials and craft details. Embroidery: tight stitching, satin stitching, straight stitch outline Leather: fine leather grain, gold foil stamped text Illustration: soft pencil texture, halftone dots, crayon doodle style Metal: brushed metal, engraved text, subtle linear grain, corner screws
Background	Define the Background Clearly (Asset-Oriented). transparent background plain background light cream background (print-style)

Negative Prompt: Specifies unwanted elements, such as “blurry edges”, “incorrect proportions”, or “low contrast”, to prevent undesired artifacts. This field is pre-filled with default terms such as error, blurry, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, outline, etc.

Note that the Token count follows the SD1.5 specifications adopted by Reallusion. Any tokens beyond the 75-token limit will be ignored.

Select the desired AI model from the drop-down list, and then use both positive and negative prompts together to help the AI generate clear, accurate, and visually consistent decals with SD1.5, SDXL, and Qwen, as illustrated in the table below.

AI Model	AI Output	Positive Prompt	Negative Prompt
SD1.5		(kawaii cat:1.3), sticker, stickers, cute, colorful, outlined, flat design	error, blurry, jpeg artifacts, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, outline
SD1.5		(retro badge logo:1.3), circle emblem, bold outline, minimal, vector art
SDXL		A simple, adorable cartoon white cat sitting upright, looking at the viewer. It has black outlines and minimal details. Cute, sticker art, vector illustration, white background.
SDXL		(retro badge logo:1.3), circle emblem, bold outline, minimal, vector art
Qwen	Embroidery
		A shield-shaped embroidered patch, vintage design, featuring the number "96" in the center with banner text "VINTAGE", three colors: red, black, and tan, tight satin stitching, straight stitch outline, top-down, transparent background, precise replica style.
		Vintage embroidered patch, bold number “1987” with black outline. Curved bottom ribbon saying “IRON RIDERS”. Thick stitching, textured thread.
	Name Tags
		A rectangular PVC soft rubber badge, front-facing, no angle, raised lettering “Aaron / Motion Designer”, glossy highlights, smooth silicone-like texture, bold outline border, transparent background.
		Front view of a luxury leather fashion label, Italian vegetable-tanned leather, gold foil stamped text on the left: “Aaron", gold foil stamped text on the right:\| Reallusion Creative Director”. Flat view with no angle, no shadows, elegant spacing, high-end brand aesthetic, extremely realistic, transparent background.
		Front view of a rectangular brushed metal industrial nameplate, flat design, no perspective, clean technical layout. Engraved text: “Aaron \| Engineering Team”. Subtle linear texture, screw heads on the corners, neutral lighting, extremely realistic, transparent background, suitable for apparel labels.
	Flat Art
		Flat graffiti-style lettering graphic, texting "FREEDOM" with arrows and splash marks.
		A detailed illustration print, featuring arched text "CALIFORNIA EST 90", and the bottom with the small banner text "Enjoy your life", two colors: deep navy and cream, front view, neutral lighting, vintage coastal lifestyle print style, transparent background.
		A high-quality illustration print, featuring bold red script typography "CLASSIC DRIVE" over smaller text "CO.", with red checkered flag borders above and below, distressed texture, front view, light cream background, vintage speed shop apparel graphic style.
	Metal Ornament
		Cross-shaped metallic piece with intricate floral carvings, baroque ornament style, symmetrical, plain background, centered, concept art
		Single metallic wing piece, embossed feather detail, highly detailed, symmetrical, gothic style ornament, plain background, centered, no human, concept art, positive light