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

Development Rendering

chentuo (totochen) February 19, 2021, 10:27am 5

it works in 4.26