[1.15.2] Help rendering semi-transparent textures?

[SapphireSky]

I'm trying to render overlay textures to replace the player HUD, but for some reason the transparency is being displayed as opaque.

I didn't have to do anything special to make it work in 1.12.2, but did that change? I can't find anything in IngameGui around where it renders the hotbar to affect transparency, so I don't understand why it's not working.

 

This is what it's supposed to look like (with transparency) vs what it looks like in game (without transparency).

[poopoodice]

I think the alpha of RenderSystem.color4f should do the transparent rendering (0~1), I'm not sure tho.

[Draco18s]

1 hour ago, poopoodice said:

I think the alpha of RenderSystem.color4f should do the transparent rendering (0~1), I'm not sure tho.

No, that's a separate thing. That will render the entire texture with uniform transparency.

[poopoodice]

8 minutes ago, Draco18s said:

No, that's a separate thing. That will render the entire texture with uniform transparency.

true, or enable blend may work?

[TheGreyGhost]

Hmmm I wonder if that is sometime to do with ForgeIngameGUI? (It replaces IngameGUI)

 

Possible causes I think:

1) alpha test is not enabled; or

2) alpha test threshold is not right (i.e. the "transparent" texels in your texture have an alpha value that is above the alpha test threshold and blending is off)

 

I suggest you put a breakpoint into the start of renderGameOverlay and trace through step by step to see why alpha test is not enabled or the threshold is not right.

 

-TGG

 

 

 

 

 

[Budschie]

I recently worked on a gui, and I enabled transpareny with this lines of code:

Spoiler

RenderSystem.enableAlphaTest();
RenderSystem.enableBlend();
RenderSystem.defaultBlendFunc();
RenderSystem.defaultAlphaFunc();

 

 

Edited June 7, 2020 by Budschie