[1.12] Something wrong with rendering in world

[XsergeiX]

Currently, I try to add some sort of area highlight for my mod. While i were doing this, I noticed, that if I draw poly or anything else rather than line, i have to draw it from both sides.

For example, if i draw horizontal quad, i have to draw it twice, one for view from top, second one for view from bottom.

First question: is there a way to draw both sides without duplicating 4 vertex with a bit different order(like on pic above)?

https://pasteboard.co/GIzevKV.png

Second question: why is happening on pic above?

https://pasteboard.co/GIzfiWJ.png

Is there any normal way to control that? in some cases i would prefer if the alpha wouldn't stack, in another case the opposite - so it would stack.

Any kind of suggestions are welcome.

Edited September 2, 2017 by XsergeiX

[Draco18s]

10 minutes ago, XsergeiX said:

Currently, I try to add some sort of area highlight for my mod. While i were doing this, I noticed, that if I draw poly or anything else rather than line, i have to draw it from both sides.

This is 100% normal and expected.

 

As for why the alpha's rendering oddly, no idea.

Edited September 2, 2017 by Draco18s

[XsergeiX]

2 minutes ago, Draco18s said:

This is 100% normal and expected.

Okay, i got answer for first question, thanks =)

 

Still looking for someone who knows, how to deal with alpha...

Edited September 2, 2017 by XsergeiX