How can I improve this image and make it look more seamless?

[Guest]

Hey!! So this isn't exactly a question, I just need your opinions...

So I am a beginner in photoshop and I tried to substitute the brain in this photo

with this photo of Trump

I fiddled around with the face a bit to make it look like a bit more swelled and this is the final thing that I came up with

I guess the face still looks a bit out of place. Unfortunately I now closed the workspace so I can't get back to working, but still, can you guys give me some suggestions on improving this the next time I do this kind of thing?

[davescm · Accepted solution]

The main one is the lighting.

The brain is lit from below - trumps head is lit from above and the sides. That bright light in the jar should be lighting up the skin under his chin.

After that - it is a glass jar so show some reflection in front of the face to make it convincing.

Dave

[Guest]

How can I do so? Sorry, I am a beginner so I would appreciate you telling me step-by-step what to do