====== Avoid Curtains ======

This tutorial will guide you through removing curtains at your surfaces.

==== Requirements ====

**Data**

Curtains are artefact lines from the border of grids looking like vertical lines or vertical surfaces.\\
{{:tutorials:themecalc:35e40fe38c629d25020a51c5fa28e2e6.png}}

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==== Step 1. ====

Curtains can be removed by using the following settings:

‘Double click’ on the surface to open the settings.

In ‘General’, adjust the ‘Black Area Margin’ to max.\\
{{:tutorials:themecalc:d021fc41e0cc9bcb204cd7c17ae61309.png}}

In ‘Material’ set the ‘Resolution’ to 1024 or more. (A high resolution can make performance in the 3D window less good)\\
{{:tutorials:themecalc:039d7f5896ae3a806ff9197a6911d8e2.png}}

==== Result ====

{{:tutorials:themecalc:e1d6fae86cfeb03442ce1ecc0e96de50.png}}

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