Help with the graphics side!

[Nodeki-Tan]

Hi!, im interested on fixing the texturing issues, and adding a per block lighting system(like minecraft, with RGBI and flood fill) but the lack of documentation has made me get lost in the sea of code, i have been able to start a Tick block simulation(buggy) better than a random one, but i need some guidance on where i need to look to work with the textures and lighting of the chunks, i can write(and have done in the past) a shader for Greedy Mesh voxel worlds but im lost on where to inyect this data!