SceneCapture2D transparent clear color?

Development Programming & Scripting UI
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1

Hi,
I try to make a minimap. I have setup a camera that renders to my SceneCapture2D and my material transfers it to my texture. The problem is that I want to have the black part transparent. How do I achieve that?

125010-capture.png
125010-capture.png691×664 105 KB

125031-capture2.png
125031-capture2.png906×750 130 KB

The code used to set the SceneCapture2D s clear color to transparent.

What am I missing here?
// Called when the game starts or when spawned
void AMiniMap_Cpp::BeginPlay()
{
Super::BeginPlay();
USceneCaptureComponent2D* sceneCaptureComponent = FindComponentByClass();
sceneCaptureComponent->TextureTarget->ClearColor = FLinearColor::Transparent;
}

2

i might be wrong. If the outline is red, take that red pin from the Texture sample and plug it in to the opacity.

3

i think changing it to additive instead of translucent will do it - or you can x minus 1 the node you are putting into the opacity mask (invert your alpha channel)

4

While this works brilliantly for the screenshot above, it doesn’t work if I add anything that is not red.

5

Changeing it to additive doesn’t do the trick because I couldn’t have anything black in my rendertexture. But the 1-x works (At least I have to check it with more data on it). Thank you.