Bump map multipliers questions

[bardo]

Hi,
I've some questions about bump map multiplier as it seems working in a way that I can't understand if it's designed like this or it's a bug.
CPU engine (but seems that GPU is doing the same)
Normal map attacched to a VrayNormal node attacched to the bump map slot of a VrayMtl.
Bump multiplier at 0

ekjsjon.jpg

E1MMBbz.jpg
The image is correct, the wooden floor is smooth.

Now..if I set the Bump multiplier to 1 and set the Bump Map Multiplier to 0, the wooden floor is not smooth but bumped.
Bq8T4Ov.jpg
and this is the same result if a set Bump multiplier to 1 and Bump Map multiplier to 100%
So, what's the use of Bump Map Multiplier?
The same behaviour if I change the TexMap Multiplier of the VrayNormalMap node (the slider near the texmap input)
T4us2lZ.jpg

[iavor_vajarov]

Hi bardo,

Thank you for spotting this.

The UI for the Bump Map and Coat Bump Map inputs is showing a widget which allows blending the texture input with a fixed color value. The Multiplier on the right side is actually the blend factor (I guess we could come up with a better description too). This is not appropriate for these inputs. A simple input socket for the texture without the blend factor should be shown instead. I will create a ticket for this.

In the meantime, please only use the combination of a texture attached to the BumpMap socket and a value/texture for the Bump Amount property. The same goes for Coat Bump Amount.