 Art director Aaron Garbut said that the enhanced version 's graphical upgrade came largely from the addition of first @-@ person . Remodelled cars feature interior effects including functional speedometers , fuel gauges and dashboard handbrake lights . The team added new particle and lighting effects , " like fireflies at night in the countryside , or ambient light pollution over Los Santos at night " , according to Garbut . Red Dead Redemption ( 2010 ) inspired the team to add more vegetation to " break up the hard edges [ and ] straight lines " of the open world . The original version 's vegetation was replaced with more detailed equivalents in the enhanced version . An upgraded weather system lets tree branches and leaves blow realistically in the wind . The team hand placed weeds along fences and walls , and placed grass over many of the open world 's terrains . They then layered flowers , plants , stones , leaves and litter over the grass . An upgraded screen space ambient occlusion system renders dynamic shadows that may cast through weather effects including volumetric fog , and particle effects including light reflections in water bodies or neon reflections in cars at night . The ambient light pollution over nighttime Los Santos may dissipate in poor weather . A dynamic depth of field system sharpens and softens images to emulate camera autofocus , and improved shaders produce new colours in skin and terrain textures . 
