In my dissertation, I have felt the need to illustrate some ideas with the help of figures and illustrations which I have found available in existing literature. I have borrowed a number of them and I give proper citations and everything. My question is:
Will it be considered a negative point to have multiple borrowed figures from existing publications?
Also, in two cases, I found it hard to rephrase the captions for the images and I just quoted the captions(the proper way). Does that look like I am being lazy?