Reflections and bumpmaping: strange.... ;-)

[Ivo_]

Hello! I have a strange behavior: If i use the bumpmapping on a reflection material (like a lake) i become strange reflections/speculars. The same texture in displacement looks ok. Is this (in the moment) a restriciton (bug) in Corona for C4D?

Best regards from vienna!
Ivo

[Nejc Kilar]

It kind of seems to me they are differently mapped, you sure that have the same mapping / size? :D

[Ivo_]

Hello! It is the same mapping..... 

Here, for testing, the C4D-File.
Cinema 4d R16 (and R17 tested), Corona Alpha 4 (Core 1.2)

Thank you for testing! :)

[maru]

I checked a lot of things, also tried to change gamma of the bump texture, not sure if I did it correct. In 3ds Max when you are loading a bitmap, you can either use gamma 2,2 or override it to custom value. For bump maps, it is recommended to use gamma 1.0. I nested the bitmap into "layer" and then changed gamma to 0,454 , no effect though... Maybe someone who knows C4D better could check if changing gamma has any impact on this?

I only discovered that lowering glossiness value of the material seems to help, but it looks like the bumped reflection is incorrect anyway.

[Ivo_]

Hello, Maru!
Thanks for your Comment. I have now tested the texture-pic with Gamma 1.0 but nothing changed. :-/
The same strange reflection issue.

So i make a 2nd scene with this settings and a bump-map-pic with gamma 1.0. See you?

It ist important for me, to check up this. So i test it for a big architecture-visualisation on a big lake.

Thx for your interest.
best greetings

[maru]

Reported on Mantis.