<h1 dir="auto">Environment</h1>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Windows build number: 10.0.18363.476
Windows Terminal version (if applicable): 0.6.2951.0"><pre lang="none" class="notranslate"><code class="notranslate">Windows build number: 10.0.18363.476
Windows Terminal version (if applicable): 0.6.2951.0
</code></pre></div>
<h1 dir="auto">Steps to reproduce</h1>

<p dir="auto">Run midnight commander <code class="notranslate">mc</code> with fontSize equal to 12 and with <code class="notranslate">cascadia code</code> or <code class="notranslate">consolas</code> font.<br>
It is worth noting that with fontSize 14 or 10 the background renders correctly without black lines.</p>
<h1 dir="auto">Expected behavior</h1>

<p dir="auto">Background should be blue with no black lines<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/16341131/69148356-03b4ad00-0acc-11ea-95ac-49948d6b1e0a.png"><img src="https://user-images.githubusercontent.com/16341131/69148356-03b4ad00-0acc-11ea-95ac-49948d6b1e0a.png" alt="Screenshot (29)" style="max-width: 100%;"></a></p>
<h1 dir="auto">Actual behavior</h1>

<p dir="auto">Background has black lines<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/16341131/69148364-09aa8e00-0acc-11ea-9774-b53cb50f3990.png"><img src="https://user-images.githubusercontent.com/16341131/69148364-09aa8e00-0acc-11ea-9774-b53cb50f3990.png" alt="Screenshot (31)" style="max-width: 100%;"></a></p>
<p dir="auto">Just a reminder for the new Windows Terminal, remember to make sure block and line drawing characters fill their cells properly at all zoom levels.<br>
This is really important for ANSI-art and TUI apps.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/25664275/57269801-20861780-7089-11e9-8436-34c5525b3024.png"><img src="https://user-images.githubusercontent.com/25664275/57269801-20861780-7089-11e9-8436-34c5525b3024.png" alt="ANSIart conhost" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/25664275/57269804-22e87180-7089-11e9-9a40-b35e9d0fe89f.png"><img src="https://user-images.githubusercontent.com/25664275/57269804-22e87180-7089-11e9-9a40-b35e9d0fe89f.png" alt="ANSIart WinTerm1" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/25664275/57269808-254acb80-7089-11e9-9ceb-b074cc27d1cc.png"><img src="https://user-images.githubusercontent.com/25664275/57269808-254acb80-7089-11e9-9ceb-b074cc27d1cc.png" alt="ANSIart WinTerm2" style="max-width: 100%;"></a></p>
<p dir="auto">See color bleeding and horizontal lines in the larger Windows Terminal tab.<br>
Also, some characters are randomly replaced by � (&lt;?&gt;) characters when changing zoom level or when printing out lot of VT markup.</p>