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You may encounter the problem, that the ship in the menu and all characters are drawn pure black, here is a fix for that:

- open the terminal and enter "wine regedit"
- go to "HKEY_CURRENT_USER\Software\Wine\Direct3D"
-> if there is no "Direct3D" folder, add "key" and type "Direct3D"
- go inside and add "DWORD" with the text "MaxShaderModelPS"
- see that the value of that is set to 0, it should be automatically
- in the game, set shadows to "medium" to avoid the rest of the bugs

Furthermore, if you want to force anti-aliasing in WINE to make it look less jagged, force it in your system driver via Nvidia-Settings for example and follow these steps:
- go to "HKEY_CURRENT_USER\Software\Wine\Direct3D"
- add string "Multisampling" with the value "enabled"
- add string "OffscreenRenderingMode" with the value "backbuffer"

I have heard that some games may start giving you problems with the backbuffer, if that is the case, simply change the value to "fbo", the forced anti-aliasing won't work then though.
Post edited November 29, 2019 by Klumpen0815
avatar
Klumpen0815: You may encounter the problem, that the ship in the menu and all characters are drawn pure black, here is a fix for that:

- open the terminal and enter "wine regedit"
- go to "HKEY_CURRENT_USER\Software\Wine\Direct3D"
-> if there is no "Direct3D" folder, add "key" and type "Direct3D"
- go inside and add "DWORD" with the text "MaxShaderModelPS"
- see that the value of that is set to 0, it should be automatically
- in the game, set shadows to "medium" to avoid the rest of the bugs

Furthermore, if you want to force anti-aliasing in WINE to make it look less jagged, force it in your system driver via Nvidia-Settings for example and follow these steps:
- go to "HKEY_CURRENT_USER\Software\Wine\Direct3D"
- add string "Multisampling" with the value "enabled"
- add string "OffscreenRenderingMode" with the value "backbuffer"

I have heard that some games may start giving you problems with the backbuffer, if that is the case, simply change the value to "fbo", the forced anti-aliasing won't work then though.
Hi,

hopefully this works, because this is my first reply to a post in the GOG forum.

Your advice works for me and it is great. Although I own an early Linux Version of Jack Keane made by RUNESOFT searched for solutions to run the Windows Version.

As I fixed the graphical glitches with your post another problem came up.
Sound and graphic generally is OK, but there is no speech output.
It doesn't matter if I changed the registry or not.

Do you have a Solution for this?

Best regards