Without logs, I cannot diagnose any issue. Follow the
rules, please !
My guess however, is that your issue is caused by (a) graphics driver bug(s). If the sculpties were rendering fine before you updated your driver, then it's definitely the case; the sculpties rendering in the Cool VL Viewer was not changed in many months (years, even), so it definitely cannot be a recently introduced bug, and the rendering algorithm is the same as in any other viewer, with the exception of "oblong" sculpties (sculpties which sculpt texture is not square but rectangular: usually used for benches, fences, and things that are longer than large), for which the level of details (LOD factor) is automatically raised (so that they render fine, even when seen in the distance).