Unity panel shadow is low resolution - looks pixelated at 3K+ resolutions with scale 2.0

[Daniel van Vugt]

Unity panel shadow is low resolution - looks pixelated at 3K+ resolutions where the scaling factor is 2.0.

We should be providing a higher resolution texture so that pixelation isn't visible at scale 2.0.

[Daniel van Vugt (vanvugt)]

Also it looks like we use GL_NEAREST instead of GL_LINEAR for texturing the shadow. I vaguely recall I left it that way for performance in years gone by. Still should be fine to use GL_NEAREST providing the shadow texture itself is at least 2x the resolution needed for scale 1.0.