help to make in autocad 2016

[SheWolf]

Hello everyone!! !
I need assistance for a render that I am doing, it is not much that I do them (a week!!! )
At the moment I am beating myself with a control room, premitting that in regards to lights and materials I am not finding problems I must admit that I am very lacking on the quality of the outgoing images.
the first attempts seemed at first sight ok but when I went to edit with photoshop as soon as I zoomed down immediately (I don't know if it's the right term)
(sets render: coffe break, 800x600px)

to this I believe I have solved by increasing the size of the image in pixels from 800x600 to the format a3 1920x1080, the problem now is that I remain a little grainy as if it had not finished the process of rendering
(sets render: lunch quality, 1920x1080)

I've done a few different researches between explanations and tutorials but I can't find the solution, now I'm going ahead to attempts

 

[Tristan]

try to set the makengine variable to 0 and try again

 

[SheWolf]

erm....doing so I changed a little bit the graphics of the commands and the window of rendering... I disappeared the options luch quality and coffe break....and launching the render came practically all black as if he had ignored the lighting I set before. ...

What's that command for? ?

 

[Tristan]

reset the old rendering engine (mr) instead of rapid rt

 

[SheWolf]

I got it.

But as I said now it's all black:36_1_3:

 

[SheWolf]

another interesting effect came out
always lunch quality always measure a3, however while those of before were hight, those I send you now are draft