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啦 龙虾 avatar image
啦 龙虾 asked ·

I have a problem with c4dtoa about how to render A glass bottle with water

when render a bottle with water ,I found a huge part of bottle is black .I followed the 'rendering glass surface with Arnold ' in arnold for c4d guide to modeling ,but its no work .I want to know how to remove it

glass
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thanks everyone answer my question ,I changed the HDRI sky and the normal direction is right ,but its doesnt work,When I turn up ray depth and transmission ,its come to use,at the same time ,new question have arisen ,The body of bottle and bottleneck is too dark.In order to remove black part ,I have to turn ray depth up to 14 or more,and rendering time take long to three time as long as,isnt that too long? is there another way?

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Lee Griggs avatar image Lee Griggs 啦 龙虾 ·

Isn't it dark because it's just refracting the black areas in your scene? Add a sky/HDRI or model something to reflect/refract in the bottle.

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???where is my question

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Lee Griggs avatar image
Lee Griggs answered ·

How does it look without the liquid? Are the normals facing the right direction? Transmission Ray Depth is high? Did you scale the liquid up?

How does it look in the glass bowl or studio scenes here?

If that doesn't work, please upload the scene.

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thanks ,I have a new question about it ,Could you answer?

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Lee Griggs avatar image Lee Griggs 啦 龙虾 ·

Where? Can you reply to the answers here first, please?

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here you are

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crasse deux avatar image
crasse deux answered ·

try with an arnold sky (just with a white texture for example, and make it only visible in reflection and refraction if needed) black parts maybe because you have no background, so the liquid material has nothing to refract.

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xebajac@zdfpost.net xebajac@zdfpost.net avatar image
xebajac@zdfpost.net xebajac@zdfpost.net answered ·

Just invert normals....go to polygon mode and right click on the object then look for reverse normals and cliclick it.

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Aaron Ross avatar image
Aaron Ross answered ·

Specular Ray Depth also needs to be high... it needs to be at least 4 to avoid dark areas.

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