Developer Notes

This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.


When attempting to import a texture that has a non-opaque alpha content and compressing using the "masks (no sRGB)" texture compression setting, pixels that are in the alpha channel are being weighted as being less important.

Steps to Reproduce
  1. Launch editor from binary launcher (4.9.2)
  2. Create a new blank template without starter content
  3. Import the "original_mask_with_alpha" texture
  4. Double click the texture to open in texture editor
  5. in the "view" drop down uncheck "alpha"
  6. in the details panel under compression change the value next to compression settings to "Masks"

The pixel values contained within the RGB and alpha channels should be weighted with the same importancy.

The pixel values in the alpha channel are being weighted as much less important than the ones in the RGB channel creating artifacts in this area.

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Won't Fix
Affects Versions4.11
CreatedNov 11, 2015
ResolvedFeb 14, 2017
UpdatedApr 27, 2018