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Ray traced shadows disappear on distant foliage objects

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    Ray traced shadows disappear on distant foliage objects

    When ray-tracing, shadows are disappearing on more distant foliage... I have a bunch of aspen trees from Speedtree as static meshes in the foreground and as a procedural foliage object and painted foliage in the background of this shot. In the non-ray-traced version, the background trees (at left) shadow each other and themselves as do the foreground trees (at right) as expected:

    Click image for larger version  Name:	Chat_6uvSR7yKcG.jpg Views:	0 Size:	176.2 KB ID:	1720978

    But with ray-tracing on, the shadowing on the background foliage trees disappears:

    Click image for larger version  Name:	UE4Editor_OqJYFtnDBo.jpg Views:	0 Size:	204.6 KB ID:	1720979

    As the camera approaches the background, the foliage trees will become fully shaded...???

    I thought that ray-tracing meant not worrying about shadow distances! Now I can't find the setting that could be causing this. Can anyone suggest what setting might cause ray-traced shadowing to stop at a distance on foliage?

    Thanks!

    -Donald
    Last edited by NC3D; 02-13-2020, 09:16 PM. Reason: Clarification: it only happens on foliage ojbects

    #2
    Anyone? This seems like a big problem! Why would ray-traced shadows on foliage disappear at a distance?

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