Textures in HTML5

Any idea why my textures appear like this on HTML5.
It’s perfect on windows builds, but as I launch on web the tiling gets messed up.

Any tips as to how to make textures or Materials for HTML builds?
Thanks.

Check out this thread Texture issue in HTML5 - Rendering - Epic Developer Community Forums with a similar kind of comment. In particular, try making the texture width and height a power of 2? (256, 512, 1024, …)

What about the first picture, with patches? Will changing texture’s width and height to a power of 2 get rid of those dark patches too?

Not quite sure about what’s going on in the first picture. In that one it looks somehow as if there are blocks of different brightnesses, which suggests that these are perhaps 4x4 pixel blocks of DXT1 compressed textures? (or some other texture compression?) Given that the blocks look so large, perhaps increasing the resolution of the texture might help there. If there’s a way to disable DXT compression, you could try to see if that affects the result.

Alright, and what about colours instead of textures? If I have a white colour for the walls and not a texture?

Not sure about that. Perhaps worth a shot to try out. One other thing that came to mind is perhaps the issue might be due to low resolution of light maps, and increasing light map sizes could improve quality? ( https://forums.unrealengine.com/development-discussion/content-creation/108201-lightmap-resolution-problem )