private void checkBox_surfaces_CheckedChanged(object sender, EventArgs e)
{
if (this.checkBox_surfaces.Checked)
{
this.checkBox_separateobj.Enabled = true;
this.checkBox_saveUV.Enabled = true;
}
else
{
this.checkBox_separateobj.Enabled = false;
this.checkBox_saveUV.Enabled = false;
}
}