Horse Not Textured

sketchfab

Sculpt of a horse, currently untextured but will be painted and textured soon. If there are any scuptris users out there who know why I get the problem on half of the model when I export for it not displaying correctly please help me? I know it’s a problem with symmetry, now that I have turned symmetry off and had the result above, but not why it has a problem in the first place…