It is a low poly model, when I am using brush in small size it is making these dotted lines instead to solid stroke. The UV image is 2k*2k, still I am getting these pixelated result. I am only paining colors in the model. How can I solve this. Thanks in Advance.
It looks like if you zoom too much, a brush radius of 1 or 2 is below the size of your image pixel, so I guess it draws a pixel every n pixels, therefore these dots. But if you scale up the size of your original image (like 4000 x 4000) it will works twice better, or just increase the brush size up to 10, you'll have the same thickness and less dots.
You'll see more clearly what's happening if you switch your Image Texture from Linear (which blurs the pixels) to Closest . With this option you'll see the real image and the real pixel size, and the difference between the pixel size and the brush size. 1 or 2 is much too small compared to the pixel size of your image. Here the brush size is 15:
