> ## Documentation Index > Fetch the complete documentation index at: https://docs.altoura.com/llms.txt > Use this file to discover all available pages before exploring further. # Object System # Objects for Surface Types When creating for the object system there are a few requirements based on the surface type for the object to be able to spawn on. ## Floor Object *Object Requirements:* * the pivot of the GameObject parent should be at the bottom center of the mesh object * a collider on the GameObject parent that covers the area of the object that will be clickable / draggable (if there is no collider added at this level there will be a box collider generated on this level by the code) *Portal Requirements:* * set the constraints of the object to **Horizontal (Floor)** when creating or editing the object in the portal

## Wall Object *Object Requirements:* * the pivot of the GameObject parent should be at the back center of the mesh object * the z forward of the pivot should be facing backwards to define the front of the GameObject is * a collider on the GameObject parent that covers the area of the object that will be clickable / draggable (if there is no collider added at this level there will be a box collider generated on this level by the code) *Portal Requirements:* * set the constraints of the object to **Vertical (Wall)** when creating or editing the object in the portal

## Ceiling Object *Object Requirements:* * the pivot of the GameObject parent should be at the top center of the mesh object * a collider on the GameObject parent that covers the area of the object that will be clickable / draggable (if there is no collider added at this level there will be a box collider generated on this level by the code) *Portal Requirements:* * set the constraints of the object to **Ceiling** when creating or editing the object in the portal

## Hanger Object *Object Requirements:* * the pivot of the GameObject parent should be at the top center of the mesh object * a collider on the GameObject parent that covers the area of the object that will be clickable / draggable (if there is no collider added at this level there will be a box collider generated on this level by the code) *Portal Requirements:* * set the constraints of the object to **Hanger** when creating or editing the object in the portal

# Additional Object Customization ## Adding a Horizontal Surface Adding a horizontal surface to an object will allow for other objects with the horizontal constraint to be added on top of the object. *Object Requirements:* * a GameObject named 'Horizontal' as a child of the object parent * a collider on the GameObject parent that covers the area of the object that will be clickable to add a another object to

## Adding a Vertical Surface Adding a vertical surface to an object will allow for other objects with the vertical constraint to be added on top of the object. *Object Requirements:* * a GameObject named 'Vertical' as a child of the object parent * a collider on the GameObject parent that covers the area of the object that will be clickable to add a another object to

## Adding Slots to an Object Adding a slots to an object will allow for other objects to be added in specific slots on the object if there are horizontal surfaces defined in the object. ### Slots for objects of any size or type *Object Requirements:* * horizontal surfaces on the object (see above for how to add a horizontal surface to an object) * a GameObject named 'Slot' with children at the positions of the slots

### Slots for objects of a specific type and any size *Object Requirements:* * the 'Slot' GameObject parent name to follow the pattern: Slot$TypeOfObject ex. Slot$Shirt *Portal Requirements:* * add type (can be any tag) to tag list when creating or editing the object in the portal

### Slots for objects of a specific type and size *Object Requirements:* * the 'Slot' GameObject parent name to follow the pattern: Slot$SizeofSlot#TypeOfObject ex. Slot$Medium#Shirt *Portal Requirements:* * add type (can be any tag) and size (only tags **small** / **medium** / **large**) to tag list when creating or editing the object in the portal

## Adding Hanger on a vertical placed object *Object Requirements:* * a GameObject named 'HangerPivot' as a child of the object parent where the hanger object will be spawned * a collider on the GameObject parent collider should be at the back side and z direction facing forward (+Z) *Portal Requirements:* * set the constraints of the object to **Vertical (Wall)** when creating or editing the object in the portal

## Adding Slots to an Object with Horizontal Surface Adding a slots to an object will allow for other objects to be added in specific slots on the object if there are horizontal surfaces defined in the object. ### Slots for objects of any size or type *Object Requirements:* * horizontal surfaces on the object (see above for how to add a horizontal surface to an object) * a GameObject named 'Slot' with children at the positions of the slots * the slots transform y direction should be facing upwards (+Y)

## Adding Slots to an Object with Vertical Surface *Object Requirements:* * same as Slots with horizontal surface * only change is Slot z direction should be facing forward (+Z)

## Adding Slots to an Object with Hanger Surface *Object Requirements:* * the 'Slot' GameObject parent name to follow the pattern: Slot$TypeOfObject ex. Slot$HangerClothes * the slots transform y direction should be facing upwards (+Y) *Portal Requirements:* * add type (can be any tag) to tag list when creating or editing the object in the portal

# Object Filtering ## Adding a Tag to an Object Create an empty GameObject as a child of the object which we need the filter for. This tag can be added to an [object in the portal for filtering](/docs/tutorials/hello-world-space-builder/upload-object). Filter naming convention - $Filter#TagName Eg - $Filter#Pant