Texture Resolution for Absolute photorealism

[adamrg7]

hello all. i am working on 3d scenes that need to look absolutely real. im just wondering what texture resolution to use with octane render for absolute best quality photrealism.

Heres a random texture from cgtextures.com:
http://www.textures.com/download/concre ... 252/120688

Small-1013x1024 Free - 1 Credits
Medium-1584x1600 Premium - 3 Credits
Large-2970x3000 Premium - 9 Credits
XLarge-4951x5000 Premium - 20 Credits
XXLarge-6450x6513 Premium - 84 Credits

what resolution should i be using for textures are what are the implications for vram with or without out of core texture feature, computer processing for 3d application or anything else..thanks
-Adam

[mbetke]

In theory I choose my texture resolution after roughtly estimating how big (in pixels) it will be seen on the sceen/rendering.
If you put your bunker model on a far hill only 50px large, then you the smallest resolution will be fine.
The other way, if you make a close-up shot of a bunker wall, then you would stick to a high resolution because of more visible details. In some cases you would enhance your model with additional geometry. For example real modeled moss growing on the structure.

[gordonrobb]

Yup, it all depends how big that texture is going to be on screen.

[adamrg7]

So if im doing a music video where these gona be all kinds of different shots, close, far.. etc.. animation obviously. What should I do?