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Why does an object render differently when flat normal map texture is used (128/128/255 in photoshop) vs if solid color is used in Rocket via Vec3 (0.5/0.5/1)? What would be the equivalent of flat normal map if I want to use solid color through Vec3 (for whatever strange reasons 🙂 )? Just by trying different values, seems like setting the blue to 100 makes the object render as if a flat.


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1 Answer. Sorted by: 1. In the most common normal map encoding, an RGB value of (0.5,0.5,1) would be uniformly flat. If the shader is meant to be unlit, you should be able to remove anything in the code that's using the surface normal, light / view direction, etc. Share.


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What is a Normal Map? A normal map is an image that stores a direction at each pixel. These directions are called normals. The red, green, and blue channels of the image are used to control the direction of each pixel's normal. A normal map is commonly used to fake high-resolution details on a low-resolution model.


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The Normal map workflow used in the past will still work, but if you want higher quality shading, this is currently the best workflow to use. It also allows you to use much less supporting geometry since you do not have to fight incorrect shading. You can use this method one of two ways. One is to give your model a single smoothing group.


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1. For more realistic shading, normals most often vary smoothly. This is often achieved by interpolating the normals across the surface, either by interpolating between face normals or vertex normals. Face normals are easy to obtain (like the flat shaded case), but hard to interpolate. Vertex normals are easy to interpolate (see Phong shading.


A flat normal map.

Normal maps are a type of Bump Map. They are a special kind of texture that allow you to add surface detail such as bumps, grooves, and scratches to a model which catch the light as if they are represented by real geometry.


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Home Multimedia Computing normals to achieve flat and smooth shading By CodeGuru Staff February 5, 1999 This article demonstrates in practice how to compute face and vertex normals to achieve flat and smooth shading using OpenGL. Definitions In geometry, a vector is an object which defines a direction and a norm.


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By definition tangent space is perpendicular to the surface. At any point we should have the normal always pointing in the Z (blue direction) with no X (red direction) or Y (green direction). Thus the normal map (since it is a "normal map") should have the colour of the normals which is just blue (R = x = 0, G = y = 0, B = z = 1) with no shades.


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2-channel tangent space normal map: turns out that using the information stored in two of the three channels of a normal map, the computer can calculate the third one, reducing memory usage but slightly increasing processing usage.Since memory is usually a bigger concern, this optimization is commonly used and some engines do it automatically (i.e. Unreal Engine when we set a texture normal.


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What is a Normal Map? Normal maps look strange, but like any other texture map, they are just flat 2D images. Here's a close-up shot of a 3D bird character. To the right is a close-up of the bird's normal map. The highlights and shadows on the bird's feathers are being created by the patterns in the normal map.


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In 3D computer graphics, normal mapping, or Dot3 bump mapping, is a texture mapping technique used for faking the lighting of bumps and dents - an implementation of bump mapping. It is used to add details without using more polygons.


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The idea behind this technique is to produce continuous shading across the surface of a polygon mesh, even though precisely the object that the mesh represents is not continuous as it is built from a collection of flat surfaces (the polygons or the triangles). To do so, Gouraud introduced the concept of vertex normal.


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Normal textures. A "normal texture" looks like this : In each RGB texel is encoded a XYZ vector : each colour component is between 0 and 1, and each vector component is between -1 and 1, so this simple mapping goes from the texel to the normal : normal = (2*color)-1 // on each component. The texture has a general blue tone because overall.


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This is an attractive color but was not chosen arbitrarily. RGB colors have values between 0 and 1, whereas a model's normal values are between -1 and 1. A color value of 0.5 in a normal map translates to a model normal of 0. The result of reading a flat texel from a normal map should be a z value of 1 and the x and y values as 0.


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Flat Mole This photo contains content that some people may find graphic or disturbing. See Photo Heather L. Brannon, MD The moles in this picture are completely benign. One of the features of benign moles is their uniform color throughout, but these moles have a speckled pattern.