I am doing renders on a somewhat old laptop through cpu and not GPU. not the fastest set up but gets the job done slowly and surely. I do have an issue where i created a scene of a dark room for pictures with semi realistic textures and tons of objects. rendering a frame takes around 19-20 minutes.
and now I am trying to do a rendering for an intro of a video with a flat white background (diffuse) and a couple objects with transparent textures and keyframes to make them appear. no fancy materials used, yet the render time is at about 15 minutes. I have done plenty of renders before and none took that long for such a simple set up. I just updated to 2,78, between the letters and the other objects there are maybe 10 flat objects in the screen that slide in and appear, nothing else yet the render takes around 14 minutes per frame, are transparent textures that demaning? or what is going on?
The settings I am rendering on are 1080p 100%, 50 samples, no motion blur, and i am rendering to an avi jpeg. I also have no clamping, but do have the change seed setting to 1. Never used it before, but supposedly helps get rid of noise.