RenderTarget DrawTexture modulated broken in 4.13 preview 1

In the 4.13 Preview 1 build, drawing a texture on a CanvasRenderTarget2D with “Modulated” Blend Mode produces a completely black result. Attached an example setup from a blank 4.13p1 project - the same thing works in 4.11.

I am using this technique for rendering all of the environment shadows in Garden Wars, and for highlighting objects. It’s shipping on iOS in a few weeks and I’d like to ship with 4.13 (when it’s out of preview) for the most up-to-date mobile support possible (4.13 also fixes material worldposition issues I had, and brings gradient font support in UMG).

The translucent blend mode still works, but I can’t use this, as overlapping shadows will become darker in the overlapped part (and it’d require double the texture memory from needing alpha).

Hey Spoondog,

Thanks for the test assets and explanation of the issue. I was able to confirm what you are reporting and have gone ahead and entered a bug report for the issue. You can track the issue following the link below on our new Public Issues Tracker.


Once the issue has been addressed by our engineers, the fix will be added to the release notes for fixed issues within an upcoming full engine or hotfix release.

Let me know if you have further questions or need additional assistance.