lodepng | PNG encoder and decoder in C and C++ | Image Editing library

I have coded a flat terrain made up of triangles, but it seems like there some mirroring occurs. I want it to imitate grass, but it is blurried in some spots. Do I need to add some params in glTexParameteri? Or maybe it is an error which is associated with the drawing code?

A function which reads in a texture:

I want to play around with waLBerla (website and gitlab), which is a C++ library that can be used to simulate certain physical behavior, like fluid dynamics using the Lattice Boltzmann method, but having major difficulties on how to properly set up my CMakeLists.txt, as I don't have much experience with that.

I followed the instructions to install the library, using some of the dependencies like OpenMP, CUDA and OpenMESH, which went fine.

But when trying to compile for example one of the tutorials, I just can't get it to work. So far I have the following Cmake file, where I manually list all the static libraries that have been build when compiling waLBerla:

I am creating an array of textures using GL_TEXTURE_2D_ARRAY in my code:

I have a given project structure

I have a a project with the following structure:

So I've managed to successfully implement batching into my engine, but have come across some weird behavior with the array of samplerCubes in my fragment shader. The batch renderer works fine with 2 texture units - I can successfully draw cubes with the right textures if I only bind 2 textures, but as soon as I add a 3rd to the mTextures vector, and use glUniform1i for that index in the samplerCube array, the wrong texture is displayed, even though the texture id (TexID) is correct (I checked this in the fragment shader).

The issue appears to be with my understanding of OpenGL as for some reason, the texture what should be displayed by textureCubes[2] (fragment shader uniform) is displayed by textureCubes[1], and textureCubes[2] displays the same texture as textureCubes[0]. What should be displayed by textureCubes[1] just doesn't exist with the 3rd texture bound.

Here's my code:

Main.cpp