Mega texture demo

[twollgam]

What does this PR do?

Shows how "mega" textures could be used. It is not in a state of being useful.

Closes Issue(s)

None.

Motivation

May be important for better theme support.

[github-actions[bot]]

Download the artifacts for this pull request:

• Performous-1.3.0-930-a2b808e-alpha.AppImage.zip
• Performous-1.3.0-930-a2b808e-alpha.dmg.zip
• Performous-1.3.0-930-a2b808e-alpha-debian_10.deb.zip
• Performous-1.3.0-930-a2b808e-alpha-debian_11.deb.zip
• Performous-1.3.0-930-a2b808e-alpha-debian_12.deb.zip
• Performous-1.3.0-930-a2b808e-alpha-fedora_35.rpm.zip
• Performous-1.3.0-930-a2b808e-alpha-fedora_36.rpm.zip
• Performous-1.3.0-930-a2b808e-alpha-fedora_37.rpm.zip
• Performous-1.3.0-930-a2b808e-alpha-fedora_38.rpm.zip
• Performous-1.3.0-930-a2b808e-alpha-mingw-w64.exe.zip
• Performous-1.3.0-930-a2b808e-alpha-msvc.exe.zip
• Performous-1.3.0-930-a2b808e-alpha-ubuntu_20.04.deb.zip
• Performous-1.3.0-930-a2b808e-alpha-ubuntu_22.04.deb.zip

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