Recorder produces dark semi-transparent pixels in some transparency modes

[Nixxiam]

こんにちは
When using transparency modes like "Use Original Image" or combining two images outputted by "Generate Alpha(Blend+Add)", semi-transparent areas appear darker than expected. This is visible when viewed on a white background when exported.

This is fine when using images with black backgrounds, as it is exported in the Recorder as "Generate Alpha" when exporting as spritesheets, but for effects that needed to be exported without additive blending or exported as "Generate Alpha(Blend+Add)" or "Use Original Image", especially semi-transparent ones, this can cause the blurred edges or the semi-transparent image to be darker.

[durswd]

Generate Alpha is not perfect. It cannot reproduce original color correctly.

[Nixxiam]

I understand that “Generate Alpha,” “Generate Alpha (Blend+Add),” and “Use Original Image” aren't perfect; however, I believe the issue lies more in how blending is handled rather than in how alpha is produced.

From what I have observed, Effekseer blends gamma-encoded RGB with linear alpha, which results in darker output, especially for soft or semi-transparent textures, but this isn’t noticeable with additive blending.