Developer Notes

Users will need to set their materials to Alpha Composite for it to behave as expected.


Using a translucent material with a 0 opacity does not seem to be working when using a retainer box that is attempting to apply it to the image.

When the material is set to additive or masked, it works as expected.

Steps to Reproduce
  1. Open the editor
  2. Create a new Widget Blueprint
  3. Add a Retainer Box
  4. Add an image parented to the Retainer Box
  5. Create a new material (Use the attached screenshot for the setup)
  6. Apply the material to the Effect Material of the Retainer Box
  7. Add the widget to the viewport in the level blueprint

Result: The image still shows up, even though the material is completely transparent.

Expected: The image would be transparent, having the material applied to it.

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ComponentTools - UMG
Affects Versions4.114.124.13
Target Fix4.14
Fix Commit3132231
Main Commit3133983
CreatedJul 14, 2016
ResolvedSep 20, 2016
UpdatedMay 2, 2018