No. Its not a bug. Its as designed but it can interfere with manual unloading of textures in scenes that have heavy textures. This default functionality can sometimes cripple your computer when loading scenes with heavy textures. What you have to do is go into your preferences and turn off the auto loading of tiles. This way you dont have to play cat and mouse with the auto loading tiles :P

The way Mudbox paints textures is incredible, but serious assets with many uv tiles will hit the gpu ram limitations. This is where Mari is great. Mari seems to be a great tool with great problems unfortunately (buggy and gpu sketchy but incredibly powerful). It would be interesting if the Mudbox Team could somehow implement the way Mari paints textures and bakes them out to the tile files, while using little gpu ram to display them on screen.

Frankly the mudbox way is more ideal and technically better but the ram limitations just make it unrealistic for high res multi uv tile’d characters at this point. In a sense I would like to see the current mudbox painting direction continue, but also with the option of a less gpu memory intense workflow like mari as an option. This includes Mari’s great projection filters like AO, cavity masking, edge masking etc.

:) Well look what we have here…

This is will be exciting. I miss being on the beta. I dont get to see the cool toys early anymore.

Very interesting. I think Mudbox does texture painting in a more ideal way compared to Mari. If this new mudbox paint engine solves the gpu ram limitation problem, it will make a lot of people happy.

It will be interesting to see how many layers and polys it can handle. In the video I see 1 diffuse layer. It would be nice to see bump maps, specular and diffuse without hitting into ram problems.

This looks very promising though!

-Adam