It is not a bug. That effect was already present in the pristine unoptimized code. Quoting Vector Fabrics new blog post [1]: "Some people wondered if the HUD t

It is not a bug. That effect was already present in the pristine unoptimized code. Quoting Vector Fabrics new blog post [1]: "Some people wondered if the HUD textures are messed up in the optimized version, because the demo shows that as soon as you get hit by a monster the health and score numbers seem to blow up in your face. The answer is that this is part of the game play and already present in the original unoptimized version." [1] http://www.vectorfabrics.com/blog/item/accelerating_the_idtech_4_engine_with_pareon_a_follow_up http://www.vectorfabrics.com/blog/item/accelerating_the_idte...