Am 08.03.2018 um 10:00 schrieb mathzhaoliang:
> I'm using 3.7 and if ambient is 0 then the grout in the shadow are all black...
You're not using radiosity?
Whenever you want something to look realistic, make sure to use radiosity.
BTW, with radiosity on, ambient is ignored (presuming your scene has
`#version 3.7` or higher), so you can leave it at the default.
