I should try this with your image before I suggest it, but I have no time today; sorry. The Workbench renderer has an option for no anti-aliasing, so that could get you there. Here’s the tutorial where I got the idea: https://www.youtube.com/watch?v=W-5vQfd4Lh0
@alphayash Welcome to BA! I suggest you make your question into its own topic, since it has basically nothing to do with OP’s problem, might attract more people who could help you, and be much easier to find by other people who have similar questions.