I'm relatively new to Cycles, so maybe I don't understand all its finer points yet. I am trying to create a normal map from a grayscale bump map produced by an OSL script. The script seems to output the grayscale data just fine, as seen here (output through an emission shader for visibility purposes):

http://i889.photobucket.com/albums/ac94/smashuu/ScreenShot2013-11-15at110710AM_zps9c27c76e.png

But when I try putting that through the bump node, I get nada in the resulting normal output:

http://i889.photobucket.com/albums/ac94/smashuu/ScreenShot2013-11-15at112148AM_zps5f08218d.png

Just to be sure I'm doing something stupid, I tried the same node setup but with a noise texture node instead of the script's output for the bump node's "height" input, and got the expected results.

I haven't been able to find much info about the bump node, but is there a reason it can't use the grayscale data from an OSL script for the height info? If so, is there any way to work around that?

I'm relatively new to Cycles, so maybe I don't understand all its finer points yet. I am trying to create a normal map from a grayscale bump map produced by an OSL script. The script seems to output the grayscale data just fine, as seen here (output through an emission shader for visibility purposes):

But when I try putting that through the bump node, I get nada in the resulting normal output:

Just to be sure I'm doing something stupid, I tried the same node setup but with a noise texture node instead of the script's output for the bump node's "height" input, and got the expected results.

I haven't been able to find much info about the bump node, but is there a reason it can't use the grayscale data from an OSL script for the height info? If so, is there any way to work around that?