Back to the Future: Ep 4 - Double Visions

protonopen appid 94520Game compatibility - Unofficial

ValveSoftware/Proton#1814 · opened 2018-10-25 by GlacialTurtle · updated 2019-06-20 · 2 comments · github · game page · search this game

GGlacialTurtle 2018-10-25 github

Compatibility Report

Name of the game with compatibility issues: Back to the Future: Ep 4 - Double Visions
Steam AppID of the game: 94520

System Information

GPU: AMD HD7770 2GB
Driver/LLVM version: Mesa 18.2.3, LLVM 7.0 (Padoka PPA)
Kernel version: 4.15.0-38-generic
Link to full system information report as Gist: https://gist.github.com/GlacialTurtle/82e549d61b5b0e2e6e09ff70ec57ede3
Proton version: 3.7-8

I confirm:

[x] that I haven't found an existing compatibility report for this game.
[x] that I have checked whether there are updates for my system available.

Symptoms

Episode 4 (appid 94520) specifically does not render correctly, but the other episodes do.

Comparison images between episode 3 (appid 94510) and episode 4 (appid 94520):

https://imgur.com/a/MvK1Vej

As the camera moves away from characters, they become darker in appearance which also produces noticeable triangular artefacts. Other surfaces e.g. in the initial main menu background also don't render correctly.

Tested on both AMDGPU and Radeon kernel drivers, both produce the same results.

Reproduction

Simply playing the game.

GGlacialTurtle 2018-10-26 github

Messing around with it some more, I noticed that this episode did not have an installscript.vdf file in the games directory, while the other episodes did. The file tells Steam to run DXSETUP.exe on first run which presumably installs the necessary DLL's needed for the game to render correctly. Copying the vdf file from episode 5 and editing 2 lines meant steam ran the initial setup like it did with the others, and fixed the rendering issue. The 2 lines that needed to be edited were "hkey_local_machine\\software\\telltale games\\backtothefuture105.exe" to 104 and "savegamefoldername" "Episode 5" to Episode 4.

Ccorvusd 2019-06-20 github

I only copied the .vdf of episode 3 to the folder of the episode 4. And it ran like a charm! :)

Nothing extracted yet.