PrusaSlicer-n8 2.4.0-beta2 - Take two: put on yer shades edition

This release changes only the shaders to improve the lighting scene for inspection purposes.

Feedback welcome and encouraged.

Before:

After:

Before:

After:

Before

After

If possible, adjust your GPU settings to avoid ugly moiré on FDM slice visualization.

With Nvidia graphics, I have found the following settings to provide the best results:

• Increase Antialiasing - Setting to maximum. 8x, if possible.
• Enable the Antialiasing - Transparency. I have only experimented with the maximum 8x supersampling -- perhaps the other lower options provide some benefit as well, but max is best.
• FXAA we want off. Always. It's always worse when on.
• Anisotropic filtering is not necessary.

Tl;DR: Antialiasing - Setting to 8x == GOOD; With also: Antialiasing - Transparency == BETTER. But the transparency setting is only helpful if antialiasing is maxed out. Otherwise, textures look worse!!!? Experiment.

Linux AppImage compliments of @P-C-R