# Multiscreen

A calibration multiscreen can be used to calibrate curved or other shaped LED-Walls.

Basic configuration of defining the screen size, resolution and marker IDs are the same as a Single Screen. For details please refer to [here](/grid/virtual-production/calibration-screens/single-screen.md).

{% hint style="info" %}
[You can export a Multiscreen as FBX](/grid/virtual-production/calibration-screens/multiscreen/export-multiscreen.md)
{% endhint %}

![](/files/f9xoNldfIswLMr295q11)

The Screen can be added within the object tree.

The multiscreen is one object with contains multiple surfaces.

Each surface represents a part (like each column) or each single panel of the real LED-Wall.

{% hint style="warning" %}
It´s important that the screen/surface dimension as well as the resolution is matching perfectly with the real wall.
{% endhint %}

With a secondary click on the object a “surface generator” can be opened.

![](/files/8jR7wrnJqQa42t2ypJfQ)

{% hint style="info" %}
Changing the “Mode” to “Add” will just add the defined surfaces instead replacing all.
{% endhint %}

A curved LED-Wall setup could looks like this. (21 columns, each 0,5m width, 4m height)

![](/files/0bkEoe0yQuv1KTq95lhZ)

![](/files/8gaa9dYmMylEsrzP9Zu3)

![](/files/LMw3ynFf8AuEElOypxW4)

Go now into the tab “Screen” and define the output mapping resolution.\
For example 4096×2160px and click on “Generate Texture”.

![](/files/dT7KArgt3BQUXZ2Rsm2N)

Within the tab “SP Pattern” it´s possible to define the size for each single marker.\
Change these for example to 0,25m.\
Go back to Screen and click again on “Generate Texture”:

![](/files/R6anb7rFsTSgWZF2ka4G)

{% hint style="info" %}
Don´t wonder, that you will see black boarders.\
This is to avoid pixel interpolation.
{% endhint %}

{% hint style="info" %}
If you are running out of markers, you can switch the “Tag Generator” into “Shuffle” mode. 
{% endhint %}

Within the Inspector it´s possible to now export the image as png.\
Click on the ( I ) and click on “export marker image”.

![](/files/jSaxRnwq8qSH2aqDSoAn)

{% hint style="info" %}
The mapping coordinate can be change for each single screen within the tab “Surfaces”\
\
![](/files/J4LIqyvZYBAFbpkWzfkK)

{% endhint %}

{% hint style="info" %}
It´s also possible to add surfaces manually within the inspector instead of using the generator.\
Just click on the (+) within the “Surface” tab.
{% endhint %}

{% hint style="warning" %}
By default the location orientation of the first surface will be not modified. (Master Screen)\
This can be changed within the calibration tools.\
\
Just click on Screens and select within the screen list the chosen screen.\
\
![](/files/GF2rI386ADm54uHJusBr)\
\
You can now define the “Master Surface” in the inspector.\
\
![](/files/g24AVtSMmplPU2GXAFwb)
{% endhint %}


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