What you have observed is normal appearance of semen.
Semen is typically translucent with white, grey or even yellowish tint. The semen contains sperms from the testes (2-5%) as well as secretions from the the seminal vesicles(70%), the prostate (27%, and the bulbourethral glands((1%).
The mucus (described as bumps, by you) in the semen, serves to increase the mobility of the sperms, and when the semen is deposited in the vagina, it helps prevent the diffusion of sperms out of the semen.
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