I understood this moment by myself some time later (the passive work of the subconscious), but leaved the post as is for the next time. :)

The main problem is not in distribution of my product or absence of respect/thanks for me.
The main problems are:
1) in the fact of SELLING fun-product created for free use by gog to the publisher (Square Enix);
2) in the fact of not providing the appropriate info for me (if I knew that the patch will be included into official distributions of the game, I had create additional fixes like I distibute now (at least, achievements engine for Steam + updated bink engine), and they were included already in the official distributive of SR1; now it is impossible to do due to stupidness/laziness/f*ckiness of SE);
3) in the fact of no support for the product they (gog) "improved" - look at their activity here.

P.S.: and again, about pixelization - I remember that I saw this moment on my PC and I solved it. Now I use updated version of my patch which is included dgVoodoo, no more. (And official version of SR1.)

For dgVoodoo, how it's work ? Install the game and install this program and it's ok ?

Ok thanks

So I tried and I did not understand How it works

I install the game, Voodoo

http://dege.freeweb.hu/dgVoodoo2/QuickGuide.html

I'm stuck at the question 2 with Glide.dll and all.. What exatly I put in the game data ?

SR1 uses DirectX, so you need to copy 3 files from the MS folder into the game folder, as I said already early.
The game will use (load) ddraw.dll (DX-wrapper of old DX through DX11) from its folder instead of system ones.

http://dege.freeweb.hu/dgVoodoo2/dgVoodoo2.html

Can you tell me what to download please ?

http://dege.freeweb.hu/dgVoodoo2/dgVoodoo2_55_4.zip

Thanks what next?

https://www.gog.com/forum/legacy_of_kain_series/hd_cinematics/post18

Ok so now i have "dgvoodoo" on the Bottom right in game but that's tall : intro still the same : i can't see anything.

Screen :

http://image.noelshack.com/fichiers/2018/43/2/1540291530-dg.jpg

In the launch menu i have this :

http://www.noelshack.com/2018-43-2-1540291574-dg-2.png

I tried all : pilots and resolution.

Game Folder :
http://www.noelshack.com/2018-43-2-1540291729-dg-3.png

What am I doing wrong ?

Nothing. Sooner dgVoodoo can't help with this problem. I checked SR1 on my PC - no pixelization at any settings.
Though, there is one moment: why do you choose in the settings at the start Primary VideoCard, not nVidia ones?

Fuck it ! I'm giving up !

Thanks Hate_gog for your help.