The problem with the textures in the linux version of the game (ATOM RPG)

Good day, I tried to run in the Slack (14.2) and Ubuntu (latest lts 16.04.6 and-beta) toy, with the standard nouveau driver works, though not too quickly. Put proprietary wood for your card nvidia 340.107, the textures are anyhow any

http://images.vfl.ru/ii/1554721356/2028d3bb/26108635_m.png http://images.vfl.ru/ii/1554721497/e882284a/26108682_m.png

and here is the log: https://paste.ee/p/jYTzL

something I have observed in the Slack and free the driver, there was a need to deliver the package libtxc-dxtn because in older versions of mesa, this algorithm is not yet integrated. Visually with a proprietary wood she runs faster, but that's not possible to play. Maybe someone knows what to do? Sent in a support message to developers, no response yet.