When rendering to RenderTarget in a blueprint I need to write all 4 channels of the render target. There’s no problem in writing color values (rgb), but I can’t find the way to write directly to the alpha channel of the render target. Value in alpha channel is not related to color, but will be used …

After inspecting source code I found that there’s not correct way to make it. However there’s workaround if one wants to output all 4 channels to the empty render target. Here are the steps: In a blueprint: clear render target to (0, 0, 0, 1) color Make you material Unlit, set blend mode to Alpha…

[4.13] How to write alpha channel when rendering to RenderTarget from Blueprints

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anonymous_user_36844f02 (anonymous_user_36844f02) March 27, 2023, 10:50am 6

It do not work on mobile in 4.27.