Eyeon:Manual/Fusion 6/BumpMap
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The Bumpmap tool either converts an greyscale (heightmap) image into a bump map or takes a bumpmap created by the Create Bumpmap tool directly. The Bumpmap outputs a material.
Input Port
Bumpmap.ImageInput (white): Receives the RGBA channels from an image for the bump calculation or an existing BumpMap.
Controls
This tab contains all parameters for the tool
Toggle between Heightmap, which will create a bumpmap similar to the CreateBumpmap tool, and BumpMap, which expects a bumpmap created by the CreateBumpmap tool.
The process of generating the bump information is basically a Custom Filter. This multibutton control sets the filter size.
Set the channel from where to extract the greyscale information from.
Clips the lower values of blue channel in the resulting bump texture.
Basically "wraps" the image at the borders, so the filter produces correct result when using seamless tileable textures.
Changes the contrast of the resulting values in the bump map. Increasing this value yields in a more visible bump map.
Optionaly converts the resulting bump texture into the desired bit depth.
Notes on Bumpmaps
There is some confusion of terminology with bumpmapping depending which papers/books/people you are reading/talking to. This can cause confusion for artists. Here are Fusion conventions:
An greyscale image containing a height value per pixel
An image containing normals stored in the RGB channels used for modifying the existing normals (usually given in tangent space)
An image containing normals stored in the RGB channels used for replacing the existing normals (usually given in tangent or object space)
Tips for BumpMap (edit)
EyeonTips:Manual/Fusion 6/BumpMap
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