Forcing plymouth into graphic mode

In Fedora 10 RHGB has ben replaced by plymouth which no longer uses an X server. Depending on its configuration plymouth will show an animated solar in default configuration during startup. Depending on your graphic card plymouth might not be able to show this graphical screen and just show a text progress bar during boot process.
To use the much prettier boot animation you need to pass the vga parameter to the kernel:

kernel /vmlinuz- ro root=/dev/mapper/luks-a0756b8b-2ad8-4758-8b7f-e8225ae0ced7 rhgb quiet vga=0x31b

Depending on your desired colours and screen resolution you need to apply any of the parameters below:

Colours/Resolution 640x480 800x600 1024x768 1280x1024 1600x1200
256 0x301 0x303 0x305 0x307 0x320
32k 0x310 0x313 0x316 0x319 0x321
64k 0x311 0x314 0x317 0x31A 0x322
16M 0x312 0x315 0x318 0x31B 0x323