help me fix my invisible model

ok so what i did was get a human model from sketchfab(.obj file format) and then color it a bit in blender then importing it into sfm correctly by compiling the .qc files and stuff but its not visible...

i dont have an image texture or anything since i dont need it yet and there is only colors on my model but even after i imported it correctly to sfm its not visible so how do i fix it?