how to make realistic blood??

[Marcel]

The soft specular on the blood makes it look metallic (maybe thay is also because of the non white specular color)

You should give the blood some real reflections, and after that you should give the blood something to reflect (an HDRI background or a 3d scene with some nice lights/bright planes)

[plaguelord]

Thanks! I´ll try to put a good environment hdri and some white cards around the scene.
What specular/highligths settings you recomend?

[plaguelord]

I think I get what I´m looking for, the problem was the shader set to metal, and I forgot to never use metal shader in max, now is set to one-nayar-blinn and some teaked settings.
the enviroment is not and hdri but are for reference by now.
thanks marcel!

[Radacci]

i think the highlights are to bright, and it looks like liquid red glass or something instead...the highlights should be tinted red also, because light bounced of colored objects takes with them some of that color before they hit the eye, and we see it...

I guess you could cut open a vain and see what it looks liked....or better, go to a hospital and ask for a bag of blod...or parhapps not...:D

[Invader Zim]

The blood looks like strawberry jam.
Perhaps if you use the translucent shader

[plaguelord]

ahahahaha strawberry jam! :p :p :p
you're right, I will try with translucent shader.
thanks!

[plaguelord]

how look this?

[Radacci]

looks like wet velvet or something now...:) just kiddning, im not gonna complain anymore now :)
well, im not working on a bloodbank, and i dont see blood everyday, so i dont know :)
but i guess its good enough...

[Invader Zim]

It's starting to look good.
You should try to render it against an object/background 'cause your blood shader settings might look good against white but might not look as good in your final scene.

[Marcel]

think the highlights are to bright, and it looks like liquid red glass or something instead...the highlights should be tinted red also

The strength of the highlights is very much dependend on the strength of the lights in the scene. Big lights means big strong highlights. Giving the highlights a red color makes is look metallic in my opinion. I like it much more with the normal colored (white) highlights.

Look at this art of fake blood (warning, bloody image!)

http://www.dagonbytes.com/makeup/cuts/blood.jpg
http://www.ypa.org/issues/images/features/blood.jpg

I liked your second image the most. Maybe make it a bit less transparent (blood is very dense!) and make the diffuse color a bit brighter. Like the last image you showed but with the bright white highlights :)

Another thing is use a big whitecard in your scene (plane with very white material, set the RGB level to 8 or higher), so that the blood has this nice white highlight all along the edge. That will bring out the shape much better.

[plaguelord]

thanks marcel, this like to be dificult, I´ll try the white cards, the white color for highlight, with the 3 picture mesh, but is very hard to get a photoreal blood. I´m keep tweaking the scene!

[plaguelord]

how look now? I´m very happy with this one... :bounce:

[M.Rogne]

Hmm... Looks good to me, but perhaps the white highlights are a bit too... Large.

[plaguelord]

maybe is because the scene have 4 white panels to make some reflections on the blood, in a scene with more light sources and other stuff the highlight are much more small.

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