Multiple texture rendering problem with Coin 4

[shanslow]

Hi folks,

We've encountered an issue with rendering multiple textures that was working fine previously on Coin 3.1.3. As shown below:

Rendered with Version 3.1.3

However, with version 4, it doesn’t get rendered as expected, please see snapshot
below:

Another interesting observation is, if we switch on the “Light Model node” in the scene,
the scene will get rendered better apparently.

Scene file diff - with and without Light Model switched on

Rendered with Version 4.0.0 with Light Model switched on

I've included a small application example that highlights the problem when loading in the scene.iv from within the doc folder.
coinv4Issue.zip

In our full application we also see problems with the Z depth when rotating the model whether lighting is on or off. As we rotate, some of the distant faces pop in front of the nearer faces and vice versa.

Would you be able to take a look into this and see if it's a problem that requires a fix or if there's changes/settings we can make on our side to achieve the same behaviour we were seeing previously with Coin 3.1.3?

Thanks

Steve

[VolkerEnderlein]

Unfortunately, I am not able to look into this over the next two weeks. Maybe @WizzerWorks or @veelo can you have a look onto this issue?