It's just ignored by VIS, but other than that it behaves as a normal brush, so collision etc. works the same.
Important thing is to not use them as main walls closing your map - VIS will get rekt this way. 

Picture tell more:
https://drive.google.com/file/d/0BwxYkKdSD855M2lMQngtcWhiVUE/view?usp=sharing 

To be honest this would be interesting way to show secrets.. but I guess it is not intended or have something to do with how engine draws them? I'm using Quakespasm in this case. 

well that's uh.... not an intended feature. 

I remember when GL Quake was new, if you played a map that hadn't been vised specifically with transparent water, you would see a similar effect. Looking through water, doors and other entities were visible when they shouldn't be. 

Hmm.. it should be fully vised, no leaks etc. I use -level4. 

 

If it is 0.92.1 then it is up to date.

I tried to run it on Darkplaces too, and it worked just fine. In Quakespasm and Mark V (tested so far), I had these drawing issues. 

yes i use test level 4. How can i change the level? how will it affect the compile? i have not used detail entitys since im still a beginner. thanks for that tip!

im taking a small break from my main project because its getting too large and there are so many areas im not happy with. there will still be large outdoor areas but i will make them smaller. 

light.exe

-fast

easiest way, less calculate time.

-extra

Calculate extra samples (2x2) and average the results for smoother shadows.

-extra4

Calculate even more samples (4x4) and average the results for smoother shadows. 

I ment vis.exe. 

Quick question, i downloaded some skyboxes and renamed them from .pk3 to .tga
(https://www.quaddicted.com/webarchive/kell.quaddicted.com/skyboxes.html)

i placed the skybos in id1/gfx/env

in trenchbroom i gave world entity "sky" "sky-dragonheart_"

and nothing happened. What went wrong? 

Verify the name of the actual skybox files. Is it "sky-dragonheart_" or just "dragonheart_" 

http://imgur.com/a/PTGUX 

I think there should be the 6 cube sides for the skybox files.

Like sky-dragonheartup_
"""down_
"""lf_

Can you open the pak and see if those files are contained? 

i dont know how to extract pk3.
can you send me a skybox file that i can test? 

i downloaded the skyboxes from quaddicted

https://www.quaddicted.com/webarchive/kell.quaddicted.com/skyboxes.html

i think they should be 6 sided 

is there a texture that i have to give to a brush so i can see the skybox? like sky4 

#17683 - You should be able to open it with any zip extractor, if I remember correctly;

#17684 - Due to the inordinate amount of work to compose 49 separate downloads, these skyboxes are currently only available in a single download as The Kothic Skybox Compilation
===> The Kothic Skybox Compilation

#17685 - you have to use sky texture; 

That's probably caused by a lack of sorting by distance for entities with transparency.

FitzQuake 0.85 draws entities sequentially. DarkPlaces likely sorts everything by distance.

I might rewire transparent entities to draw by distance in Mark V, but I've more focused on a mirrors on func_illusionary request for pulsar ..

And tuning some optional effects video and updating the Mac build. 

The only important VIS options are -fast for a quick and inaccurate test compile, and -level 4 for a slow(er) and accurate final compile. 

you have to use sky texture;

What is a sky texture? i used both sk1 and sky4 and both of them wont display the skybox 

i got it to work now! :)
I copied a skybox from my Arcane dimensions folder and placed in my id1/gf/env folder and it doesnt matter what sky texture i use! im happy with the result now :)))) 

I created a square room, I placed a pillar directly in the center, I set sunlight mangle to 270 -45 0

This way the sun in relation to my Top view in JACK is at the top(centered). I placed the player start in relation to the Top view at the bottom(centered).

Now when I load the map the pillar casts a shadow directly towards me, correct. Looking right, the wall has a shadow at a 45 degree angle down, correct.

But looking left the wall is completely dark. It doesn't match the right side wall which I thought it would.

What is going on?

If there is a sunlight basics link(besides ericw's descriptions) please post it, thanks. 

https://shoresofnis.wordpress.com/guides/lighting-basics/

It states "�_sun_mangle� - This has the same format as �mangle� on spot lights, �Direction, Pitch, x�, which way the sun is shining. (Not the position the sun is in)"

So my question is, how do I know where the position of the sun is?