Improve lighting from point light?

[d13]

Hi Everyone,

Can anyone suggest a way to improve the lighting on this planet model (attached image)?

The light-to-dark gradient band isn't even and seems unnatural.

There's a point light (the sun) which is the main light source and hemispheric light with 0.4 intensity.

 

Thanks!

 

[Wingnut]

Hiya d13, good to see you, as always.

http://playground.babylonjs.com/#05Q46H#1

Can you... somehow... reproduce the issue,  using that playground?  (thx)

I can't seem to "dupe" the problem.  *scratch scratch*  Are you using an energy-saver lightbulb in your pointLight, by chance?  heh.

[d13]

Thanks Wingnut!

Yours looks a lot better than mine.

Here's a version which includes the hemispheric light:

http://playground.babylonjs.com/#05Q46H#2

Is there a way to add this image as a texture in the playground(linking doesn't work)?

https://www.google.ca/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjQs5LcwvPXAhVJVBQKHc6lCC8QjRwIBw&url=https%3A%2F%2Fjcpag2010.deviantart.com%2Fart%2FUranus-Texture-Map-678497339&psig=AOvVaw038yH2E-K1mLu3xQc28XeB&ust=1512585354078237

 

[GameMonetize]

Hello either you add them to a CORS compatible server (imgur is fine) or you drop them on github and use raw.cdngit.com to get a link to it

[d13]

Thanks DK!

(rawgit works!)

I've set the material up using my values:

http://playground.babylonjs.com/#05Q46H#3

I'm seeing similar banding (although it's not as bad as in my live example)

 

[Pryme8]

That banding is by how the two lights in your scene are adding together.
http://playground.babylonjs.com/#05Q46H#4
http://playground.babylonjs.com/#05Q46H#5
http://playground.babylonjs.com/#05Q46H#6
 

[d13]

@Pryme8 Thank you, that explains it!

I do need that hemispheric light to fill in shadows - is there a better way I could be doing that?

[Pryme8]

ambient scene lighting?

[d13]

14 hours ago, Pryme8 said:

ambient scene lighting?

What is that?

[Pryme8]

http://playground.babylonjs.com/#05Q46H#7

[d13]

22 minutes ago, Pryme8 said:

http://playground.babylonjs.com/#05Q46H#7

Oh, I see what you mean now.

But it still renders the shadows completely black, doesn't it?

[Pryme8]

Nope, it renders them in the color of the materials ambientColor and the scenes ambientColor I think multiplied together.

[d13]

1 minute ago, Pryme8 said:

Nope, it renders them in the color of the materials ambientColor and the scenes ambientColor I think multiplied together.

Oh OK!

I'll do a bit of experimenting and see if I can come up with an acceptable effect.

Thanks for all your help on this @Pryme8 !

[d13]

I've removed the hemispheric light and set the `scene.ambientColor` like this

scene.ambientColor = new BABYLON.Color3(1, 1, 1);

But, I'm still getting banding - it shows up the most on the light coloured planets. It's very noticeable on Uranus, less so on Jupiter, and barely perceptible on Mercury (probably because of the texture colour)

[d13]

Just for reference, this is what Jupiter looked like previously with the extra hemispheric light:

[Pryme8]

repost a playground please, I was looking at my example and cant recreate your banding unless I add an extra light.

[d13]

Oh, It was the light.intensity! Setting it to 0.9 solved the problem!

[Pryme8]

 glad Ive been able to help out with this project.

did you ever figure out the ring shader I posted for you on the other thread? (Uranus has rings as well)
http://planetpixelemporium.com/uranus.html

[d13]

@Pryme8Yes, thank you, you've been a great help!