Meshmixer is a free open-source 3D modeling CAD/CAM tool. On occasion, Meshmixer's out-of-the-box settings will prohibit a user from viewing the color on an .OBJ file.
Note: Because Comb's .OBJ files contain color natively, we do not provide an associated .mtl file.
If you're a Meshmixer user who would like to view color on an .OBJ file, you may need to alter Meshmixer's settings. To accomplish this, hold the space bar while viewing the file and turn on the color.