What the implementer of the program shown in the video probably did was drawing the model in an additional off-screen pass with the texture ST coordinates in an off-screen pass. I also doubt that he's going through all of the model's texture's pixels to determine if they are located below the brush as increasing its size or creating paint strokes would slow things down significantly.

Super sampling won't handle extreme situations either and will be slow as hell. So my question is - how can I avoid these holes when painting from a distance? Projection mapping isn't the answer here because it would affect all faces the brush is over, even ones behind the visible surface. As usual, easier said than done: the main problem is that when we zoom out from our model and start projecting, not all of the model's UV's will be seen in screen space and therefore zooming back in should reveal 'holes' (where the model's UVs were too small to render in screen space). I assume that he's doing this by rendering an additional UV pass that allows him to replace the visible pixels with the ones from the brush texture.

In the comments, the author mentions that he's 'projecting each pixel of the gun that the brush is over back to UV space and update the original texture'. The best example of this has been shown in this video. As the title suggests, I wish to project a texture onto a 3D model (to its UV-mapped texture to be exact) in OpenGL. If you prefer a catchy and bold look, try wood shingles in some neural stain, and a fabulous look is guaranteed.I know that there are a couple of similar questions here already but the answers don't really help with what I'm trying to achieve. Wood is the most popular material to make statement walls, and the number of options is endless: you may go for a textural weathered and aged wood plank wall, a sleek wooden slab wall in some color, a shiplap wall in a bold shade, a wood slice and even weathered driftwood piece wall to bring much texture to the space.

This is a great way to upcycle some old materials and make a very stylish statement in any of your rooms. Such an accent is usually made with some contrasting paint or wallpaper with a different pattern but there’s an original idea – make it with textures! Of course, there are lots of textured wallpapers and various plastic and wooden panels from various designers, but you can also use natural stone, bricks and wood of any kind that you have – old doors, windows or just planks – they look awesome and natural. Making an accent wall is a hot décor trend and a cool way to accentuate your room.

Wall paint 3d texture