When attending a photo shoot , you would not normally be expected to arrive with your make up in place as this should be applied in the studio or on location.
When shooting topless / nude pictures, do remember not to wear tight fitting garments several hours before the shoot, as they will leave unsightly crease marks on your skin and can be time consuming and expensive to remove by editing afterwards.
Also remember that if you are shooting nude scenes ,then it is important to avoid this coinciding with your menstruation period.
Most importantly, you should act professionally at all times and ensure that you and the photographer are fully in agreement as to what level of shoot you are going to be doing.
Do remember that modelling is a small world and if you fail to turn up or are late for agreed shoots, then word will soon get around about your unreliability.