Bump mapping in Indigo....

[CoolColJ]

I already posted it in the Bugs section, but I think it's worth doing a topic for further discussion

http://www.indigorenderer.com/joomla/fo ... 9623#29623

the pic tells the story, when using a positive bump map "b" value, the bump map is inverted....
now Indigo can take negative values, so you can fix it that way for now...

There is a bug in Indigo's bump mapping, I'm surprised no one has noticed till now?!

interestingly a high bump map value doesn't increase the visual size of the bump, but just compresses the bump map range...not what I was expecting. As values around 0.001 to 0.003 matches the C4D bump value of 100%, but doesn't seem to stick out as much.
And the highest value of the bump map is not quite at maximum either.

But Indigo does show more of the low level detail in the bump map

I had to use a Reinhard tone mapping burn value of 4.5, pre and post scale of 1 to match the C4D image. With E colour balance

[OnoSendai]

Hi CoolColJ,
I don't think it's necessary to post the same post twice, I'm gonna delete this one.

EDIT: Ok just moved to the bugs section.

Usually the bump mapping is fine, see e.g. the bumpmapping test scenes.
Possibly this is some funky combination of texture coordinates, normals, or something like that.

[CoolColJ]

now I'm wondering does the same thing happen with exponent maps.....?

[CoolColJ]

BTW I don't think this is the only case of it, in that Outdoor test scene I did in Sketchup, in that brick work upright support on the left. I used heavy bump values, and you will notice the white filling between the bricks actually stick out vs receding back in...

http://www.indigorenderer.com/joomla/fo ... 28_168.jpg

[Kram1032]

C4D exporter inverts normals, if I remember correctly... in that case, that'd exactly be, what happened, here...

if you use blendigo or sketchup2indigo (sry, I forgot, how's it called? sketchigo?)

do you have the same problem, then?

[CoolColJ]

Skindigo - see see the above pic

[Kram1032]

ah, ok