How to exactly control Fresnel colours

[Monobanda]

Hello all,

Using ASE, I created a shader that uses the Fresnel node.
I want to achieve the effect of having different colours for the base of an object, and the rim. So for instance a cobalt blue sphere with a bright red rim as a result of Fresnel effect.

So far, this is what I've achieved:


Unfortunately this setup appears to make the rim a "mix" from both colours. So Instead of red, it produces a fuchsia pink colour, like this:


How can I make sure I can have total control over both colours?

Cheers and thanks!

[Amplify_Borba]

Hello, thank you for getting in touch!

Unfortunately, the images seem to be broken, could you please try uploading them to a free image service such as imgur, and share a few additional details regarding the effect you want to create?

Do you want the rim coloring to disregard the base color from the object?

If so, you could consider using the Fresnel's output as the alpha of a Lerp between two colors, for example.



Thanks!

[Monobanda]

Hi, thank you for answering.

My images were already uploaded on Imgur, kind of lame that they don't show...
But anyway, the problem is fixed, thanks to your setup.
Great job! Thank you!

[Monobanda]

Whoops - too soon. Turns out it didn't completely solve the problem. Some colours still don't display as desired.

Take a look at the two images... (also if for some reason the images are broken again - just right-click and open them in a new tab, works for me!)



See how the picked colours in the Inspector don't match up with the colours in my Scene (mostly the rim colour)?

Not sure what I've done wrong... Also I sometimes use the Saturate node when I have a feeling the colours get out of hand, but whether I plug it in or not, this time it doesn't change anything.

Any ideas?

EDIT: I don't use any lighting in my Scene other than the default environmental lighting.

[Amplify_Borba]

The values might need some further tweaking in order to accommodate to different situations, please refer to the example setup below:



I've connected the node setup to the Emission, since it controls the colour and intensity of light emitted from the surface regardless of the lighting conditions, in order to preserve the colors.

Adding the Saturate node and a Round node to the Fresnel's output can also ensure that the values remain at either 0 or 1, so that the Mask passed into the Lerp Alpha has no values in-between, which would cause the colors to blend.

Please let me know if this helps, thanks!

[Monobanda]

That seems to do the trick! Thank you.

[Amplify_Borba]

Glad to be of assistance!

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Feel free to get back in touch if you have further issues or questions, thanks!