u3shaders is a pack of shaders for S.T.A.L.K.E.R. Shadow of Chernobyl.

It is based mainly on Call of Pripyat shaders, heavily modified to properly work in SoC.

They can contain some portions of F32 pack or some others, however it is rare. If you claim an authorship of some portion of the code, please send me a note so I can mention you by your name and thank you.

Authors of the code are: GSC Studio and utak3r.

Please note for proper results you should turn on a bloom effect. Don't be scared, it's a modified bloom, and is working properly.

Always up-to-date git repository (which is a recommended source for a download) can be found here.

Recommended settings for R2 renderer:

r2_aa off
r2_aa_break 0.800000,0.100000,0.000000
r2_aa_kernel 0.5
r2_aa_weight 0.250000,0.250000,0.000000
r2_allow_r1_lights off
r2_gi off
r2_gi_clip 0.001
r2_gi_depth 1
r2_gi_photons 16
r2_gi_refl 0.5
r2_gloss_factor 4.
r2_ls_bloom_fast on
r2_ls_bloom_kernel_b 0.7
r2_ls_bloom_kernel_g 3.
r2_ls_bloom_kernel_scale 0.7
r2_ls_bloom_speed 100.
r2_ls_bloom_threshold 0.00001
r2_ls_depth_bias 0.
r2_ls_depth_scale 1.00001
r2_ls_dsm_kernel 0.7
r2_ls_psm_kernel 0.7
r2_ls_squality 0.9
r2_ls_ssm_kernel 0.7
r2_mblur 0.03
r2_parallax_h 0.5
r2_slight_fade 0.5
r2_ssa_lod_a 64.
r2_ssa_lod_b 48.
r2_sun on
r2_sun_depth_far_bias 0.
r2_sun_depth_far_scale 1.
r2_sun_depth_near_bias 0.
r2_sun_depth_near_scale 1.
r2_sun_details on
r2_sun_focus on
r2_sun_lumscale 1.
r2_sun_lumscale_amb 1.
r2_sun_lumscale_hemi 1.
r2_sun_near 12.
r2_sun_near_border 0.99
r2_sun_tsm on
r2_sun_tsm_bias -0.01
r2_sun_tsm_proj 0.3
r2_tf_mipbias 0.
r2_tonemap on
r2_tonemap_adaptation 4.
r2_tonemap_amount 0.6
r2_tonemap_lowlum 0.0001
r2_tonemap_middlegray 1.
r2_wait_sleep 0
r2_zfill off
r2_zfill_depth 0.5
r2em 2.2

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
Post article RSS Articles

Public GIT repository


I have opened a public git repository for everyone interested in getting the latest, not yet released version of u3shaders.
It is always up-to-date, and giving the fact I'm still working on these shaders, and the last release was well over 2 years ago, this is a good place for you to get them. It is also an easy way for you to get involved.
The repository can be found here.

Add file RSS Files
u3shaders 2.1

u3shaders 2.1

Full Version 6 comments

u3shaders 2.1 release. It was widely used being packaged with various big mods, like Narodnaya Solyanka and others.

Comments  (0 - 10 of 41)

Hi utak3r,

Thank you for your excellent work on this mod. I am presently using v2.2 RC3 and it is working splendidly - cheers! I do have a question for you, however: is it possible to override the automatic reduction in shadow map quality caused by increasing the r2_sun_near variable? At present, if this variable is increased from its default value of 12 to, say, 45, then the nearby shadows look terrible, even with the -smap4096 switch enabled. It would be nice if the game did not automatically butcher shadow quality when its draw distance is increased, and I am wondering if this can be done by tweaking the shaders.

Reply Good karma Bad karma+3 votes
utak3r Creator

I think it's not repairable. Those glitches, I mean.

I had this problem many times over last few years, when working on these shaders. The problem is the models in SoC are of really bad quality (they got much better later in CoP). I already had to lower down the overall quality, because of the shadows looking weird - and this is because of the really bad models.

Now, I've made a small test in the vagon in Cordon, using u3shaders, Grom's shaders and vanilla SoC shaders:

vanilla: Imgur.com
Grom's: Imgur.com
u3shaders: Imgur.com

As you can see, the errors are more and more visible, but they are always there...

The last time I was struggling with this kind of error I've lowered the overall quality, but this time I don't think I will do this - the problem is of to low meaning :)

Now I want to work on final combining of lightplanes, and then I'm done :)

Reply Good karma+1 vote

So by how you're describing this, there needs to be a model overhaul through the game to make the SSAO work properly?

Reply Good karma Bad karma+1 vote

Meltac's dynamic shaders still have the problem but it's comparatively much less noticeable than your set of shaders. You should look at his to see if there's something you could use from it, like a value or something I don't know.

Reply Good karma Bad karma+1 vote
utak3r Creator

As I said, this would destroy the whole idea of my shaders pack... why creating another the same shaders? My version works in some different way in some areas. Yes, this makes *some* things looking worse in SoC's world, but others look better :) I'll see if I can do anything without degrading the whole pack, but I can't promise anything.
Besides, my work with SoC is almost over... I'm finishing my old mod (utAMK) and I'm moving definitely to CoP. CoP is *much* better in terms of mechanics and technicals. Also, modding is much easier, as many things are already implemented there.

Reply Good karma+1 vote

I didn't say take Meltac's and use his with yours, I just said to merely look into his and see how he did SSAO to see if you can correct this as much as possible, because I've noticed the best results with this glitch from Meltac's. You can still notice black bars and **** of that like on flat surfaces but it's only when the sun hits it at odd angles, whereas I could notice the bars on miscellaneous flat surfaces, like the metal barricades and metal gates before the entrance to the Wild Territory with your shaders. All I'm saying is there has to be something that could correct this as much as possible.

Reply Good karma Bad karma+1 vote
utak3r Creator

Yep, however this is not SSAO, this is something with overall shadowing/lighting algorithm. Note turning SSAO off does NOT help here ;)
I'll see if I can find anything about this.

Reply Good karma+1 vote

That's a shame. It's okay though, I'll just play with ssao off. I'm glad you were able to fix the blurring problem :)

Reply Good karma Bad karma+1 vote
utak3r Creator

Turning SSAO off WON'T help - it's not SSAO's problem, it's shadowing/overall lighting problem.

Reply Good karma+1 vote

Oh ok. My bad.
Either way I am enjoying your shaders and I'm excited by the idea that you want to move on to CoP. Do you think you might do some work on the shaders there or did you have other plans?

Reply Good karma Bad karma+1 vote
utak3r Creator

I will start from AI modding, that's for sure (the same how I started in SoC). Then we'll see... maybe some new levels or something... (you can also check my profile's screenshots and videos ;) )

Reply Good karma+1 vote
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.

Follow Report Profile
S.T.A.L.K.E.R. Shadow of Chernobyl
Send Message
Release date
Mod watch
Community Rating



11 votes submitted.

You Say


Ratings closed.


Latest tweets from @utak3r

RT @pixarsrenderman: Check out this fantastic paper from @DisneyPixar's Per Christensen, Andrew Kensler and Charlie Kilpatrick on Progre… T.co

Jul 10 2018

RT @LaczyNasPilka: Oto skład reprezentacji Polski na mecz z #JPN w #WorldCup! #JPNPOL T.co

Jun 28 2018

Podoba mi się film Misericordia -Throne of Existence w @YouTubeYoutu.be

Jun 15 2018

Podoba mi się film Iron Maiden [Afraid To Shoot Strangers] Acoustic/Classical Fingerstyle guitar by Thomas Zwijsen w @YouTube

Jun 5 2018

Qt 5.11 is out Blog.qt.io #qt #development #dev #programming

May 23 2018

Stop breaking the Law of Demeter! Misko.hevery.com good #development #practices #dev #programming

May 18 2018

RT @gordonmacmillan: That’s just brilliant. T.co

Apr 13 2018

#cpp and blueprints working together in #UnrealEngine UI Blog.gamedev.tv #gamedev #gamedevelopment

Apr 13 2018

Embed Buttons
Link to u3shaders by selecting a button and using the embed code provided more...
Last Update
27 members