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[DPh Kraken]

The current occlusion system in graphics adventure is as functional as it can be, without displaying tile memory. However, it currently has to interpolate tile-by-tile to get its current effect. Since the game already does the trigonometric angle calculations to determine visibility, those could be sent to the renderer to generate smooth cones and curves of occluded space.

The shader could respect the pixel resolution of the fuzzy border already applied to the darkness borders we have now.

Here is a hasty mock-up of this idea, showing how a ray might look (without pixel borders). The tiles that would be fully occluded should display their last known appearance, but this is not known in all cases.

[jecowa]

I don't understand the technical polygon stuff. Are these partially-visible tiles? Why are there polygons on the border instead of straight lines and a smooth circle?

Spoiler: lines and circle (click to show/hide)

[Egan_BW]

For gameplay reasons, it should always be made clear to the player whether a tile is visible or not. Drawing the view cone through the middle of some tiles sacrifices that clarity.