Materials look strange, compared to other Engines. Help pls

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kavorka
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Hey chris, that is because that doesnt have the HDRI that I used to render it, it is just a white texture. Try different HDRI images to get a better effect.

I am not using the diamond material from the database, just a spec material with the IOR of a diamond, not sure if the diamond mat in the database is better.
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cfrank78
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Hey chris, that is because that doesnt have the HDRI that I used to render it, it is just a white texture. Try different HDRI images to get a better effect.

I am not using the diamond material from the database, just a spec material with the IOR of a diamond, not sure if the diamond mat in the database is better.
Thank you Kavorky. Bad - i wished i could have a side by side comparison from one computer to another. i wanna now if everythign works correct here. i try now with a custom made HDRI, thank you! I will post results here then!
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cfrank78
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Okkkkkkkkkkkkeeeeeeeyyyyyyy Guys!!! We slowly get to a point where i really get satisfied! :-)

I rendered your scene again and used on of my HDRI´s. I also pushed the caustic blur to 0.01 and set the " dispersion_coefficient_B" float to 0.025. This is the result i got after 6000 samples. Really much much better. Not perfect - but much better. Looks like we get to the point, where octane can show what it is capable of! Thank you so much, all you help. THANK YOU! Soon we will have the perfect Diamond rendering!
renderhdri.png
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cfrank78
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it seems that your scene is 100x bigger than expected :roll:
this explain your emission settings completely out of scale.
here is the result reducing of the scale by 100, i've only adjusted the emitter and switched to PMC with caustic blur to 0,01.
in the second one, i have changed the diamond material with the one finded in livedb/materials/non-orgnic/glass/diamond (note, the material looks withe but it's only necessary to connect the specular material inside the macro node) ;)
ciao beppe
Hello beppe!

Thank you for your effort! I tried what you said and the result is with a picture applied! it looks pretty same like yours. What i dont understand is - what do you mean with size? In my result i just made caustic blur 0.01 and changed the kernel to PMC. i did NOT change emitters or any size parameter. what exact parameter do you mean? i did not find what you were talking about. can you explain me please? my english is very bad - sorry!

Thanks again for our help and effort - soon we will get the perfect render!

Kind regards Chris!
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kavorka
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I think he means the actual size of the object in the scene.
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cfrank78
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It is a completely normal diamond stone with 6mm diameter. A small mesh is placed about 10cm from the stone made diffuse/black body emission. Normal light situation or am i wrong?
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kavorka
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he said it was 100x bigger than expected. Maybe something during export made it larger or your scene scale is wrong.
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cfrank78
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Lets wait what he will reply - i am sure he will explain :-) - and after that......Gold. how to fix it :-) i will prepare a ocs with a nice ring for you all to play with! I hope you can show me again how nice octane can handle jewelry :-)

Kind regards Chris!
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bepeg4d
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kavorka has understand correctly, you are surely modelled in the correct scale but probably there is something wrong during the translation to octane. in yours ocs the emitter has 10.000 watt with 0.6 of efficency, after scaling by 100 unit it needs only 200w with 0.025 of efficency for lighting the scene ;)
ciao beppe
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cfrank78
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kavorka has understand correctly, you are surely modelled in the correct scale but probably there is something wrong during the translation to octane. in yours ocs the emitter has 10.000 watt with 0.6 of efficency, after scaling by 100 unit it needs only 200w with 0.025 of efficency for lighting the scene ;)
ciao beppe
Hello Beppe!

Thank you very much. I saw that in my obj import settings, i had meters - not milimeters. Could that be the problem? i made a new ocs file after i imported with mm. can you have a look please if it is now correct?

And how could you see how big the szene was? the diamond should have 10mm and is exactly 56cm from the light mesh away. How can you read that out?
How did you scale it down? I hope i did it right now - if not. what shall i do?

Thank you - kind regards chris!
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