Need some helps for shadows on rendered pictures

Started by Azerious, July 16, 2021, 08:34:57 AM

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Azerious

Hello guys,
I need some help :/
For a project i want to render a 360° view model. And everything is working fine but when i try to render it i have problems with my shadows...
My english isn't that good so i guess a little picture is better than a long talk ^^

As you can see on my screenshoot here is my 2 renders one by one but when i paste them together, shadows are different and it's not a "clean" 360 view. We can see that the left part is darker then the right one.

Any idea how to fix this ??

Since i'm a beginner with this software sorry if i don't understand everything you'll ask me x)

Here my right render

Here my left one

Then here when i paste both of it

Dune

I don't think many people will click your links, so if you're genuine, upload images into the post as jpg.

Azerious


Dune

Surely, thanks. A lot of spam here with mysterious links, so this is way better. You'll probably get an answer soon.


Balletdude

Would the spherical option under camera, and setting your render output to your desired size (eg1920 x 1080) get the desired result?
attached is a quick render of an old image. first is a 360 degree spherical pano, the second is the same with just two extra copies added to show it is a perfect 306 image and the ends do match

Hope this is some help

Best

simon

WAS

It would. Definitely, but the spherical camera, cause of its use in HDRI is a pro feature only.

Balletdude

ahhh I've been using that version so long I forgot ha ha.
Thanks

WAS

Quote from: Balletdude on July 16, 2021, 01:42:18 PMahhh I've been using that version so long I forgot ha ha.
Thanks

Haha

PS you'll probably not want to use GISD with something like this, as the borders and stitching area may receive different GISD then it would in a open setup (like spherical camera).

Azerious

I forgot to mention that i don't want one single image with panorama view.
To be more complet, the project is to do a skybox for a Counter Strike Global Offensive map.. And for that i need 6 render of each face : Front, left side, right side, back, top and bottom. So my main goal isn't to get 1 render with 360 view but 6 with each one it own part of the model...
And if i paste it all together it's supposed to do a 360 view into a cube.

Final result is more something like this :


So i know it's kinda tricky but my render are "correct" everything fit well (Not on this screenshoot cuz i tried to fix bug shadow so only re-render 2 faces and not the 6 /±30min by render/ And if i still have bug with 2 of them no need to try the 4 others if you know what i mean XD)
But if i do the sixth faces it fit well (i mean on textures like mountains, trees, grass etc etc) BUT i still have problems with my shadow and i can't understand where it come from :/

WAS

Im pretty sure the renders for those skyboxes uses fisheye lenses to warp perspective so it comes out looking right. I think fisheye checkbox may be available in non pro.

Azerious

they don't, i can link you the site where i find this tutorial, and i already done one without terrain, just to get a skybox with full sky ^^
But it wasn't as good as i wanted so i tryed to push it a bit more further to get a nice one :D

(Here is the link for the tutorial : https://www.mapcore.org/topic/19547-tutorial-make-your-own-skybox-for-csgo/ )

I don't know if i can send exterioral link here, so if i can't just say it to me and i remove it ofc ^^

At least, Thx a lot for the answer, i didn't expect to get a so quickly one

Edit : i forgot to mention, when i tryed to to do it without any terrains i didn't have the shadow problem cuz ofc i had nothing in front of my sunlight" so no shadow at all x)

WAS

With solid gradients and clouds I could see how perspectives would work alright but I dont think that would be true for terrain, because it is perspective. So you will have shadows in perspective to each FOV
If you think of the final cube with images mapped, it will be a perspective per face so other faces would be out of perspective.

I dont know too much about cube maps but you'd think you'd want perspective warped at the borders so its not obvious you're living in a cube.

WAS

Maybe try this out

I didn't disable GISD and stuff, just setup some cameras.

WAS

See here, how Celestia does 6 90 FOV fisheye renders, to create the cube map, which then can be translated to a equirectangular spherical map, thus providing the right perspective for a cube map/spherical.

http://paulbourke.net/panorama/celestiasphere/