This also occurs in 4.14.3

This does not occur on Windows.

Could not get this issue to reproduce while recording the screen with quicktime player, but if you experience it in person it really feels off. Confirmed by another iMac user.

Using a logitech G100s mouse.

Steps to Reproduce

Repro 1: Orthographic views

  1. Try dragging LMB to create a selection in the Front, Left, or Top viewports
  2. See the attached video
    Result: Mouse acceleration increases as you continue to drag.

Note: this also mildly affects vertex painting, although the effect is much less noticeable.

Repro 2: Landscape:

  1. Open any project in the editor on mac
  2. Select the Landscape mode from the modes panel
  3. Click on Create
  4. Zoom out in the viewport so you can the landscape
  5. Hold down LMB and move the mouse towards an edge of the landscape
    Result: Mouse will accelerate faster as it gets close to the edge

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-40767 in the post.

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Won't Fix
Affects Versions4.
CreatedJan 18, 2017
ResolvedAug 18, 2021
UpdatedAug 18, 2021