Problem with HDR 6-sided skybox

Unity Engine
1

I have met a problem with HDR 6-sided skybox. I would appreciate for some help on this. I have some .exr files. If I import them as 2D texures and assign them to a material with 6-sided skybox shader, the color of the skybox looks not correct. An example is as follows.

This is how the original .exr file looks like:

3455375--273912--Screen Shot 2018-04-09 at 11.45.18.jpg
3455375--273912--Screen Shot 2018-04-09 at 11.45.18.jpg1659×1301 249 KB

This is what it looks when assigned to a material with 6-sided skybox shader:

3455375--273911--Screen Shot 2018-04-09 at 11.44.31.jpg
3455375--273911--Screen Shot 2018-04-09 at 11.44.31.jpg2454×1283 611 KB

On the other hand, if I import the .exr file as a cube map and assign it to a material with cubemap skybox shader, the hdr colors are correct shown as follows (please ignore the warping; we can see the color of things look much better than the above one):

3455375--273910--Screen Shot 2018-04-09 at 11.41.44.jpg
3455375--273910--Screen Shot 2018-04-09 at 11.41.44.jpg2457×1285 344 KB

Please can anyone comments on why 6-side skybox shader does not work? Thank you very much for the help.

1 Like
2

What format is the texture asset? It should show as being a BC6H after import.

3

Thank you for your reply. I have checked the texture format and it’s not BC6H. I am working with iOS and I think BC6H is not supported. What texture format should I use for HDR with iOS?

4

As far as I know iOS doesn’t support any HDR formats, so it’ll be the PVRTC format basically every texture on iOS will be. I have no idea why the six sided skybox is showing problems. It’s basically deprecated as you should pretty much always use the cube map based one at this point.

2 Likes