[OKStyle]

Code:

native TextDrawSetPreviewMaterial(Text:text, materialindex, modelid, txdname[], texturename[], materialcolor);
native TextDrawSetPreviewMaterialText(Text:text, (objectid, text[], materialindex = 0, materialsize = OBJECT_MATERIAL_SIZE_256x128, fontface[] = "Arial", fontsize = 24, bold = 1, fontcolor = 0xFFFFFFFF, backcolor = 0, textalignment = 0);
native PlayerTextDrawSetPreviewMaterial(playerid, PlayerText:text, materialindex, modelid, txdname[], texturename[], materialcolor);
native PlayerTextDrawSetPreviewMaterialText(playerid, PlayerText:text, text[], materialindex = 0, materialsize = OBJECT_MATERIAL_SIZE_256x128, fontface[] = "Arial", fontsize = 24, bold = 1, fontcolor = 0xFFFFFFFF, backcolor = 0, textalignment = 0);

Support, but I think we have a more simple way for it: change TextDrawSetPreviewModel to TextDrawSetPreviewObject and change ID from modelid to objectid. And after all changes of material we can use object for preview.