[4.9.2] PNG picture showed incorrectly in content browsers

№ 13
Title: [4.9.2] PNG picture showed incorrectly in content browsers.

Importance: Visual.

Branch: Binary.

Build version:
Version: 4.9.2-2707645+++depot+UE4-Releases+4.9

System Specs:
OS:Win8.
Additional specification will be provided by request.

Attachments: It will be provided by request.

Detailed description of the issue:
An imported PNG picture with an alpha channel area shown incorrectly in a content browser.
It is showed fine in a paper2D and a flipbook assets.

Screenshots/Link to video:
A PNG picture with alpha channel area is attached.
A window screenshot is attached.

Reproduction steps:

  1. Create a new blank project.
  2. Import PNG picture from this post.
  3. Make sure some graphical glitches is present.

Frequency: 100%

Expected behavior:
PNG picture with alpha channel showed without additional noises.

61376-!ue4_request_bugs_13.png

Hi -

This behavior that you are seeing in the Content Browser has to do with how PNG’s store color bit data in the file. They actual store the previous pixel’s information until re-read by a new pixel’s color information. TGAs typically will store a white color value until re-read by a new pixel’s color information. Alpha information for any texture asset is not shown in the content browser.

Thank You

Eric Ketchum