Texture viewport (Material Preview) based on Rasterization (Probably use Eevee) and not Raytraced.

[mercielgo]

Current way to showing textures in Luxcore for Blender is processor intensive and does not fully help in performing the task without getting slowed down. In large scene's, Texture preview (Material preview) becomes very very slow. I believe it is Raytraced, it takes time for the convergence to happen and legible texture is visible to eye.

My suggestion is to have the Texture preview Rasterized, probably Eevee can be incorporated into the Luxcore setup (Like Cycles). I liked Luxcore for its realism in Architectural work. But issue is, Architectural work have most amount of textures and Luxcore Texture preview simply doesn't help.