How to remove lines occurring between images in 6-sided skyboxes

Hi,

We are using Unity to create VR-views which will be used in experimental settings in our Master Thesis project. The views are created with 6-sided skyboxes, from images we have rendered with Radiance. When we set up the images in a skybox, white lines occur where the images connect.

Unity is quite new to us, but we found out that we should try out:

1) Setting the “Wrap Mode” to “Clamp” (which helped a lot bot not completely)

2) Unchecking “Generate Mip Map” (does only have a minor effect)

However, none of these solutions solves our problem completely as you can see on the image.

Does anyone know how to fix this problem?

Best Regards

Signe and Jens