how to make these effects(people) in photoshop?

i came across this image
i wanted to know how they did this in photoshop (the people), they blend in really well (IMHO)
thanks in advance!!!

the secret lies on your photo library nice image if you don't have, ask some friends to pose and take their photo instead based on your required angle.

find a good angle ng tao to fit your 3d. yun lang yun. crop the people. adust adjust nalang sa color balance sa brightness and contrast. ang technique dito is gaano ka kagaling mag proportion at magtugma ng kulay. you need time to find a suitable image.

photography, dodge and burn, curves, levels, blending modes, gaussian blur, motion blur, and so on...

salamat sa mga input mga masters madame pa talagang kailangan pagaralan at ang lawak ng photoshop..thank you mga sir...information overload na ata ako hehehe, vray for su pa photoshop pa.