Lighting problem

[AnKOu]

Hi, I created a skybox for a l4d2 campaign and when I test my skybox ingame, I've got a strange result.

-> http://uppix.net/b/f/7/7bc146b5e1b3ea9bd03ca30391e7f.jpg

I do not understand why it doesn't work well.

Have you any idea?

Thanx and sorry if I made some mistake i'm french.

[Henry Blewer]

I think it is how the lighting is setup in the game. Blender gets the same drop off and mismatched surface illumination. A hemisphere might work better for the sky, instead of a cube.

[AnKOu]

Thx for your answer, but it isnt the game, because when i look the picture with Windows, there is the same problem.

The top of my front view is green whereas the coresponding edge of my up view is just blue.

Besides, I can't make an emisphere because the way to make sky in the source engine is skybox

[Tangled-Universe]

This is likely due to differences in GI among your different renders.
I suppose you rendered these with GI?
For every render of the same picture the renderer comes with a slightly different GI solution which can introduce slight differences. These differences are always most prominent in the atmosphere.

You could try to increase GI blur radius a bit too smoothen it out. Be careful not to increase it too much since it will remove a lot of nice details in your clouds.
Normally it is set at 8, so try to improve it to 16, 32 etc., but not above 100 I'd say.

Martin

[AnKOu]

I tried to set the GI blur radius to 64, but I didn't saw any variations then i try 128, no variation again :/

Do you want that I give some information? I'm a beginner with terragen and I don't know what could help you to understand the problem 

[Tangled-Universe]

I tried to set the GI blur radius to 64, but I didn't saw any variations then i try 128, no variation again :/

Do you want that I give some information? I'm a beginner with terragen and I don't know what could help you to understand the problem 

If you could make a .tgd with all the 5/6 cameras set up for each side of the cube and then post it here?

[AnKOu]

here is the .tdg in attachment

[Tangled-Universe]

Thanks. I'll be home in about 4 hours and will take a look at it tonight.

[AnKOu]

Thanx for helping hand

[Tangled-Universe]

Ok, first I rendered the "Up" camera and then the "West" camera.
I ended up with a faint seam near the edges of the image, but I think it's not that hard to remove those:
Here's how it looks glued together so far.
What do you think?

[AnKOu]

The result is pretty good, but i'm not sure to understand how you proceed .

You have rendered the two views separately and them glue them together? But how have you done to get the correct seam (colors matching)?

Then do I should repeat this process with the west&north and west&south views?

Besides, I would like to keep the green of the original view (attachment) is that possible? Or maybe I could modify the up view in photoshop or other to match the up colour with the others?

[Tangled-Universe]

The result is pretty good, but i'm not sure to understand how you proceed .

You have rendered the two views separately and them glue them together? But how have you done to get the correct seam (colors matching)?

Then do I should repeat this process with the west&north and west&south views?

Besides, I would like to keep the green of the original view (attachment) is that possible? Or maybe I could modify the up view in photoshop or other to match the up colour with the others?

The result I posted is straight from the renderer. I merged the two pictures in photoshop and did nothing about the seams.
Unfortunately I'm not sure if I can elaborate about how I'm rendering this due to NDA reasons.
One other side also has seams I see now, so it's not watertight.
Looking at your scene and setup I'm strongly thinking you might even get rid of GI completely and then render it. 100% sure it will be seamless then.

[AnKOu]

I just tried to not enable the GI but it "break" everything, I havn't the blue fog and so on.

Then I will try to correct the up in photoshop by playing with hue/saturation/color, I think I can succeed.

It is just like there was a color overlay over.

Thank for your help again.

[domdib]

Have you tried Microsoft's free ICE panorama stitcher? It's pretty good at getting rid of seams.

[AnKOu]

I've some difficulties with photoshop then i tried your software but it doesnt solve my problem.

Thanx for your answer