A material using a normal map, a diffuse and a specular map.
thanks for sharing...though if I may ask, what is that getting it to 7MB? I thought it should be really simple for a circuit board....please don't take this too personal.
i think this is mainly due to the full HD render packed in the file, plus the 3 textures in png format : 2MB for the diffuse, 2.2MB for the normals and 600KB for the specular. the weight is mainly the weight of the 4 pictures. The model itself is just a basic subdivided plane.
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Really cool