This discussion may contain spoilers!
I experienced a rendering bug playing W&G Episode 3. Here's the details:
Gromit ended up getting rendered weirdly after a cutscene. The weird rendering persisted after the cutscene. See attachments.
Where the issue was encountered:
After cutscene in which Monty Muzzle yells at Gromit for trying to sneak a peek at the competitor's pies (I think - I know it was through some interaction with Muzzle).
What didn't fix the issue:
*Talking to Wallace at the truck.
*Talking to Monty again.
*Traveling to the city.
*Walking about in the game world.
*Saving, going to the main menu, and reloading.
*Quitting, relaunching the game, then loading the save file.
What fixed the issue:
Playing Tic-Tac-Toe with the chicken again.
Haven't retested the issue.
Level of Interference:
Did not interfere with game mechanics or prevent me from progressing. But cutscenes were slightly jarring until Gromit returned to normal.
Game Version: 126.96.36.199
Platform: Vista Home Premium
Graphics Setting: 5
Full screen: Yes
I hope this helps!