UV tiling question

[woytha]

Hello guys,
I need to have a high-frequency tiling bitmap and then one big non-tiling bitmap for the whole model which determines the angle of repetition of this tiling bitmap.
Do you have any ideas on how to do it?

More specifically:
I have a large-scale terrain with fly-through. So I need to combine several levels of detail. There are fields that have "lines" in their structure based on plowing and stuff.
I would like to prepare one detailed texture which would be tiling. But I need to rotate this tiling texture based on a "flow-map" which determines the angle of the field.

So I managed this:
a] load UV into the material editor
b] rotate them with the flow map (I have separate map where 0=no rotation and 1=360 degrees)
c] buuut it does not work with tiles. This solution only rotates UVs of the whole texture right?

So now I am stuck. Any idea how to get this thing done?

Thanks!

[woytha]

Ehm, two UV sets are the answer. Sometimes you just need to go to sleep )

[woytha]

Everything is almost working but the rotation does not behave as expected. I have "flow-map" where 0 represent 0degrees and 1 is 360 degrees. But the rotation does not feel to be right - I tried both converting it to radians or degrees.
What is sin and cos function using in "Vray float operations"? Thanks

https://docs.chaosgroup.com/display/...oat+Operations

[david.anastacio]

Everything is almost working but the rotation does not behave as expected. I have "flow-map" where 0 represent 0degrees and 1 is 360 degrees. But the rotation does not feel to be right - I tried both converting it to radians or degrees.
What is sin and cos function using in "Vray float operations"? Thanks

https://docs.chaosgroup.com/display/...oat+Operations

I'm assuming that "flow-map" is getting plugged in for example to a "rotation" input of an image node, right? This way you use that map to control the rotation of your textures.
The Rotation is 0-360 and you are feeding 0-1, just use a "set range" node to remap 1 to 360.



Best,
David.

[woytha]

I'm assuming that "flow-map" is getting plugged in for example to a "rotation" input of an image node, right? This way you use that map to control the rotation of your textures.
The Rotation is 0-360 and you are feeding 0-1, just use a "set range" node to remap 1 to 360.



Best,
David.

Oh no! Is it so easy? I was like rotating it using trigonometric functions and then made somewhere an error and could not find it. You made my world a much friendlier place with this post. Thank you!!!

[david.anastacio]

Oh no! Is it so easy? I was like rotating it using trigonometric functions and then made somewhere an error and could not find it. You made my world a much friendlier place with this post. Thank you!!!

Glad to help