This model works very well with RealVisXL V4.0 (Lightning).
0.8 strength is good. Upscale to obtain better results. Add Lego word is recommended.
With standard SDXL it works, butless well.
This Lora wants to add cinematic Lego look to your creations (it's not just a Lego lora).
Lego_Cinematic_Lora.safetensors