Hi, I've decided to write a follow up to the old topic as digging out old threads from 2012 is undesireble for some.
You don't have to, if you want to add to an existing discussion then it makes sense to post in the already existing thread rather than creating a new one. People who land on the old thread may never find this one and the additional information that it contains.
Is there any other way I could draw the text on the RenderTexture but without that artiffacts?
I was about to suggest the shader solution but you found it by yourself
Is there any way to achieve a proper font rendering on a RenderTexture but without shader involvement?
Right now, I have no other solution in mind. I don't know if more advanced blending modes could help to solve this.