Lighting can be time consuming and since L&P uses his own lighting for his scenes it can be tricky,I have used 3-4 different lighting assets on my renders and then filtering/progressive rendering all play a part as well.
The poses/clothing can be very tricky as well.
Take a look at the render below.
The Delia Negligee is a nightmare to use especially if you have the character sitting down,very time consuming.
View attachment 1449113
Also after messing a round with the pose use in this render it is not as easy as it looks.
Yes you could move Sophia upwards but then you would have to move the arms/shoulders/torso so that the hands would be touching the desk,to make this pose look natural is not that easy.
View attachment 1449116
This is another pose that looks simple but it is not that easy to do
View attachment 1449117
So I have to take back some of the stuff that I have said about the poses.
I have tried all the poses above in the F.A section and to make them look good and natural is not an not easy task.