thanks for the replys
@ denisgo22: yes i agree with you about the low resolution but is what the client ask and sometimes the time its a factor and the difference betwen a 3k and a 4k is arround 4 to 6 hours more.
@Bluebox: yes, we missed some details but we went short of time and i know its not an excuse, ill try to be better next time, about the spec yes you are right mi mistake, the pc specs is i7 3.7ghz 32 gigs of ram.
about the background is what the client provide and we made magic with this, the actual quality of the background images is really awful.