Specular Map Generator
Generate a specular map from an image, preview the highlight response, and download a PNG in your browser. Your source image stays on your device.
Create a Specular Map Online
Free: PNG/JPG up to 5 MB per image. Pro: up to 50 MB per image. Both support up to 4096 px per side. Adjust highlight strength, range, falloff, and blur, then preview and download a PNG specular map.
What Is a Specular Map?
A specular map is a grayscale texture that controls how strongly a material responds to direct light. Darker pixels produce a weaker highlight, while lighter pixels produce a stronger, more reflective response in workflows that use a specular input.
Specular maps control highlight intensity, not the shape of the surface. They also do not replace a normal map or a roughness map. Many current PBR materials use roughness and metalness instead, so check the input names and conventions of the target renderer before importing this output.
For related texture workflows, read what a normal map is or follow how to make a normal map. The Normal Map Generator can create normal, displacement, AO, and specular outputs from one source image. For height data, use the Displacement Map Generator.
Need to control the spread of reflections? Create a roughness map.How to Generate a Specular Map
Create a first-pass specular texture in three steps, then verify that the result matches your material workflow.
Upload a texture
Choose a PNG or JPG with visible material variation. It is processed in your browser, where larger images can need more memory and may fail. If it does, try resizing or re-exporting it.
Adjust the highlight response
Use Strength for highlight intensity, Mean and Range for the tonal response, Falloff for how brightness is distributed, and Blur/Sharp to control noise and edges.
Download and check the shader
Preview the specular map beside the source texture, download it as a PNG, and assign it only to a specular input supported by the target material.
Where to Use Specular Maps
Specular maps are most useful when the target shader exposes a specular workflow and needs per-area control over highlights.
Legacy and specular PBR workflows
Control which parts of a material receive stronger highlights when the shader uses a specular texture rather than a metalness workflow.
Material variation
Separate glossy, polished, and matte regions in surfaces such as painted metal, stone, plastic, or wet materials.
Look development
Use the generated map as a starting point, then validate the highlight response under the lighting and color-space rules of the final renderer.