Aarnoman Posted May 6, 2021 Posted May 6, 2021 (edited) Version: 2.7.6.2659 (current OB 06/05/2021) Bug: Distant terrain reflections (and also cloud reflections) exhibit marching ants/dissolve effect with rapid changes in pixel contrast, and with very noticable blocky pixels. This is most noticable when high contrast elements (eg. dark terrain, white clouds) are close by, and the reflections dissolve into each other. Video example (watch full screen at 1080p to see more clearly): (Notice how water surface and reflections below the red marked area look very believable and realistic, however get more pixelated and blocky in distant areas). Expected behaviour: Reflections should be much more stable at distance instead of the rapid pixel changes seen currently. This is as the water is relatively flat in relation to the observer due to the large distance, resulting in a more stable reflection, without high contrast elements (clouds and terrain) dissolving into each other in the reflection. Image of what I mean by "marching ant"/dissolve effect: Think of white areas as clouds, and black areas as terrain. Notice how pixels of both dissolve into each others areas. This should not occur, as in real life it does not occur at the above distances as individual wave peaks are much smaller than a single pixel by multiple orders of magnitude at the above viewing angle. Steps to reproduce: 1) Water quality set to High in settings. 2) Position camera in a way where distant terrain can appropriately be reflected by a body of water. 3) Observe dissolve/marching ant effect in reflection. Edited May 6, 2021 by Aarnoman 1
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