What's wrong with those 3d sloped windows?

[Ozymandias81]

Hello mappers/modders,

while doing a map for Blade of Agony, I encountered a strange issue that's quite giving me the holy crap: why those 3d sloped sectors are not translucent in game as they're shown in GZDB? Any suggestions/aids are REAAAALLY appreciate, thanks.

Keep in mind that above sectors you see are sloped floors in UDMF format (both control & tagged sectors).

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This is what I can see while editing with GZDB in 3d mode...


...and this is what happens when I test the map. WHAT.

WHAT.zip

Doom 2 in UDMF Format, load it with GZDoom

(2.66 KiB) Downloaded 48 times

[Gez]

[wiki]3D floors[/wiki] are not allowed to be sloped and translucent at the same time. See the third item in the "important notes".

[Ozymandias81]

[wiki]3D floors[/wiki] are not allowed to be sloped and translucent at the same time. See the third item in the "important notes".

Are there another ways / workarounds to make above stuff? Could be this a somewhat feature suggestion for GZDoom?

[Zanieon]

Yes, use the alpha of the image, obviously you will need it to be a truecolor png.

[Ozymandias81]

Yes, use the alpha of the image, obviously you will need it to be a truecolor png.

To me it works only with "grate" like textures. I tried to convert a TX on BoA from Doom to PNG TrueColor and didn't work.

[Zanieon]

simply convert will not work, you have to apply the alpha into the image yourself (Photoshop/Gimp/whatever) and reimport in slade.

[Ozymandias81]

Uhmmm... it seems that I am not enough skilled to apply alpha on non-scratch images...

This would be the texture I'm trying to edit with GIMP, but even if I add a level on it (with or without changin' it into TrueColor) or I just apply that alpha, I obtain the same result while checking it on GZDoom: no translucence at all.
That's a Doom Paletted PNG texture.

[Tormentor667]

50% translucency

[Ozymandias81]

Thankx Torm! I really need it.

[Kappes Buur]

If ever you want to do this yourself, load the png into Paint.Net
hit F4 to open the Layer dialog
change the opacity towards 0, depending on what you have in mind
hit ok
save

[Graf Zahl]

Just a note.

Translucency on sloped 3D floors is not supported - period. That includes an alpha channel coming from the texture.
The reason for this limitation is that Doom's sector based level design makes it impossible to sort these sloped translucent planes properly but for translucent stuff to render in proper order it needs to be sorted before drawing.

[Ozymandias81]

Just a note.

Translucency on sloped 3D floors is not supported - period. That includes an alpha channel coming from the texture.
The reason for this limitation is that Doom's sector based level design makes it impossible to sort these sloped translucent planes properly but for translucent stuff to render in proper order it needs to be sorted before drawing.

So no way to make my request something like a feature request that could be implemented on future GZDoom versions?

[AFADoomer]

One way you can do it that is (I think) future proof...

Make a model that's a flat cube and texture it with a solid windowpane texture.
Add it to MODELDEF with INHERITACTORPITCH and INHERITACTORROLL.
Add it to DECORATE and set the Renderstyle and Alpha to make it translucent.

Then add it to the map and adjust the angle/pitch and scale to make it fit your opening... This adds the advantage of being able to make the window shootable, with the possible downside that clipping will be sloppy because you are blocking the opening with a thing versus a 3D floor.

That's what I did here:

[Ozymandias81]

Uhmm... I had a somewhat suggestion like this but for breakable windows and not for sloped ones.... Very good suggestion and amazing Trekkian screenie. Thankx AFADoomer, maybe I'll go for it.