Drivers and normal map intensity in viewport/BI

[Michael_W]

I’m trying to dynamically mix normal maps (for a character’s wrinkles with different expressions.)

I’ve managed to use the new nodes features to successfully blend different normalmaps, now i want to add a driver.

(I know how drivers work in general) It seems that you can’t drive graph editor nodes in BI. the driver works (as inthe debug value is responding correctly) but doesn’t update the viewport or render.

I read somewhere that you can add drivers through the outliner so have researched that, found the correct data block and added one that way but that doesn’t work either.

last year i had drivers blending normalmaps in cycles nodes but they’d only update at rendertime

Is this a BI limitation?

[SkpFX]

Might try launching blender with --enable-news-depsgraph
As I understand it drivers in node trees are still a work in progress.

[Michael_W]

It’s ok, I figured out a workaround! I added a spot light and used the red channel as a factor for my mix. I can add a driver to the lamp colour and everything worksgreat!