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Rendering with Arnold in CINEMA 4D using the C4DtoA plug-in.
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I have a problem with c4dtoa about how to render A glass bottle with water

12 REPLIES 12
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Message 1 of 13
Anonymous
719 Views, 12 Replies

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

4769-qq截图20191014121433.png

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

4767-qq截图20191014115010.png

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12 REPLIES 12
Message 2 of 13
lee_griggs
in reply to: Anonymous

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.

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 3 of 13
crasse2
in reply to: Anonymous

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.

Message 4 of 13
aaronfross
in reply to: Anonymous

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

Message 5 of 13
Anonymous
in reply to: Anonymous

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

Message 6 of 13
Anonymous
in reply to: lee_griggs

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

Message 7 of 13
lee_griggs
in reply to: Anonymous

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

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 8 of 13
Anonymous
in reply to: Anonymous

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?

4805-second.png

4804-frist.png

Message 9 of 13
Anonymous
in reply to: lee_griggs

here you are

Message 10 of 13
Anonymous
in reply to: Anonymous

???where is my question

Message 11 of 13
Anonymous
in reply to: lee_griggs

I dont why the question disappear ,

Message 12 of 13
Anonymous
in reply to: lee_griggs

look this picture

4808-qq截图20191016202253.png

Message 13 of 13
lee_griggs
in reply to: Anonymous

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.

Lee Griggs
Arnold rendering specialist
AUTODESK

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