Fix Shadow Swimming

[Gabbell]

Story Points: Infinity

Priority: HIGH

This occurs due to the light position moving with the player. Apparently, we should move the size by a certain increment based on a texel size.

Link 1
Link 2

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Sub-Tasks:

• Investigate using sampler2DShadow instead of the normal sampler2D. It seems it might be easier although I could not make it work (Gab).
• Day & night cycle.
• Shadow mapping

Completion Criteria:

• Remove shadow swimming and implement a day & night cycle.

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