make a rainbow effect

Hi,

i would make a rainbow with a single sprite. So i use the set RGB coeficient with the formula : B+G*255+R*255*255. But the result is false : if G=1, i have a red (255,0,0). if R=1, i have a green... If B=255, i have a red...

Can you help me to have a good rainbow cycling ?

thanks

You've probably inverted red and blue,
in Fusion it should be:

R + G * 256 + B * 256 * 256

Or use GetRGB(red,green,blue) so you can maybe have a cleaner control

Thanks for your reply !!! Get RGB is the solution !!! :)