OTOY Forums

Hello Everybody!

I saw breathtaking renders with Octane - so i am quite sure i am doing something wrong - but i cannot figure out what! The Materials i need - for example gold or diamonds, look very different and unrealistic, compared to other render programs i use. The Gold looks - brown, washed out - and the diamonds do not have sutch nice caustics and nice reflection. i made a view renders compared side by side, so that i can explain exactly what i mean. i hope you guys understand me!

Diamonds: As you can see in the first picture - the diamond is clear - it has brilliance and clarity and all the caustics, the reflection look really nice. if i do the same in octane, same scene 1:1, same settings - the diamond looks like as in the second picture. its also not clear, has no clarity - no brilliance! So why is that? What am i doing wrong?



Gold: Here you can see very good the difference in the diamonds. Picture 1 are the diamonds clear and nice - in the Octane render they look so.....NOT CLEAR - brown....boring. Not right. Also the gold in comparison. It just looks----wrong colour, wrong saturation - i dont know. If i take a piece of 14 karat Gold here beside me - hold it beside these 2 pictures, number 1 winns a 100 times. Just look at the ground planes - these will show best what i mean! Here i also used 1:1 the same setup and same lights. At least i was not able to make the ground plane 1:1 like in the upper picture, because of the missing UV mapping features, like i had in the other program, but you can see the difference clearly i think. In this scene i used pink 750 from the material live database and in all diamonds i used materials/organic/stone/ diamond physicaly right. But no matter which material i take from the live database, or experiment by my own, i cannot reach the quality of the first picture.

I hope you see what i mean and can help me to get in octane the same nice renders like in the other Program - at the moment the other programm just kills octane in terms of quality and reality but after the renders i saw, i know octane should be able too.

I added the scene ocs file and also the obj file here in a rar file. It is free for you all and anybody can try it. Help and tipps or your rendered results would really be appreciated. If it is possible with octane.....i wanna know how!

Thanks for your help -

kind regards Chris!

cfrank78, try to make a light source less

cfrank78, try to make a light source less

Mikinik - i used in all scenes the same light sources. 1:1. Scene 1 just a emitter 6500 Kelvin, same Wattage, same Aperture, same everything. - scene 2 (ring) on both the same HDRI. How could that explain the difference in the quality, colour, clarity?

Thank you - kind regards chris!

Adjust Maxdepth for your PT and try again
also notice the difference in the diamond material you provide vs the one in the database. Yours has a more yellow tint.

Adjust Maxdepth for your PT and try again
also notice the difference in the diamond material you provide vs the one in the database. Yours has a more yellow tint.

I raised maxdepth in my Pathtracing kernel up to 100. No difference. Still no caustics.

I added the szene - can you, or anybody else, try it and put here a picture after you accomplished the mission? i think telling me how to try is useless. you experts try to make the octane picture look like the first i posted, with the scene i added, and then post your ocs or screenshots here - i think that would be the best help for all.

i KNOW that i have this yellow taint. it is in the gold, in the diamonds - everywhere. you have my scene - render it 1:1 like i did and look if it looks similar to my picture. i dont know why i have this tint. do just i have it or is this normal for octane.

Thats why i aded the scene in this post - so its for all the same situation and all can compare!

Thank you all very much - kind regards Chris!

I just did a diamond test earlier today.

It was a quick test and havent messed with much, but you need to adjust the caustics blur in the kernel settings, very bottom. That should allow the caustics to come through.

Edit: Also, try different camera responses, the default one has a slight yellow tint (try linear, but everything will be darker, so bump up the lights). There is no white balance built into Octane YET (they are working on it and have some test images in the forums), but you could do it in photoshop if all else fails.

I just did a diamond test earlier today.

It was a quick test and havent messed with much, but you need to adjust the caustics blur in the kernel settings, very bottom. That should allow the caustics to come through.

Edit: Also, try different camera responses, the default one has a slight yellow tint (try linear, but everything will be darker, so bump up the lights). There is no white balance built into Octane YET (they are working on it and have some test images in the forums), but you could do it in photoshop if all else fails.

Hello Kavorka!

Thank you very much for your help!

Is it possible that you share the ocs, so that i can see if on my computer the render will look like yours?

Your diamonds look much nicer than mine, but as far as i can see you also have no caustics in them. they look like Zirkonia, not like diamonds. In diamonds, for jewelry rendering i need fire in the stones! You can´t do that post in Photoshop!

Again, thank you very much - Chris!

Here is an updated rendering. I added caustic blur which will allow light to pass through glass and create caustics, left at a value of zero, you will not see any caustics. The higher the value, the less accurate and detailed your caustics will be.
I am also uploading my scene.

One thing to note, I used an HDRI map for my environment, but I changed it to just a float texture (white) for this because the HDRI is like 80 megs and didnt want to upload that. If you use an HDRI, load it as a "float image" instead of "image". This will load it as a black and white image and will make it only cast light on the scene, not color, giving you more control. It will not render like with using the basic float texture for environment.

Both of the lights I am using are set at 0 opacity so that the light itself isn't reflected in the diamond. It was turning too much of the diamond pure white.

The diamond model is a free object I found online, it is not fully accurate, but it is close (and I was just doing a test).

Hello Kavorka!

Thank you very much for your help and your scene. I really appreciate it!. I renderet your scene. I just dragged your ocs file into octane standalone and let it work......i changed absolutely nothing. I let it render till up to about 13000 samples.....but the result is simply horrible. why does it look like that? Can anybody else try that scene? Whats wrong here?
Kind regards - Chris!

it seems that your scene is 100x bigger than expected
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