metallic texture

[eoghanobrien]

hi all,

im fairly new to vray and i use it with rhino 4.0. i have a question regarding a metallic texture effect i want to use on the exterior of a building im designing. i have used a simple metal texture with a reflective layer and have so far not achieved the results im after.

i have attached a jpeg of what effect im looking for here:

http://www.e-architect.co.uk/images/..._b130212_5.jpg

the metallic wall at the center is roughly what im after, any information involving tiling, reflection, HDRI and cubic maps would be brilliant.

eoghan

[ledisnomad]

Hi, eoghan.

I'm no expert, but I think you need to include a few maps. You may be able to get away with two: a map in the diffuse slot with the joint pattern and a bump map for the joints and irregular reflections. Make your reflective layer glossy, too. About 0.7-0.8 might be good. As for the HDRI, look into the dome light. The key to HDRI in my limited experience is the image you use. If you have more specific questions as you try things out, I'd be happy to continue to help, as I'm sure would others.

Cheers!

[kostenurka]

If you look careful at the picture, you see where texture is overexposed. Keep in mind this is not due to direct light but reflection from exterior environment. Imagine now how it will look if exposed on direct sun light?!

I would download some copper material and modify it, set up also the tile size and play A LOT with the sun angle! Link the sun to both parameters in environment slot.
With physical camera + late afternoon sun setup (make sun size to 10 and intensity 0.1-0.2)+ Reflection set to hdri (the one in Maps slot in material editor). Dome with hdr should help too (in that case, keep subdivision parameter for the dome texture not less than 64) you should get some result. Also you must use infinity plane with some color!!! Infinity plane with brown color a bit warmed maybe.

My experience with vray is that no hdr can substitute a real geometry (with materials) for environment-except for the sky of course. (Maybe with the latest build things are different). Its hard to make environment with rhino... but the more you compose the better image you get. Also you might want to render reflection in extra channel for mixing in photoshop

that's according my experience. maybe some of the settings above exclude each other, but I would go trough all that
good luck

[eoghanobrien]

great answers guys, thanks for your help.

ill take all your ideas on board, try them out and post my progress in this thread. i may have more questions if you don't mind answering them!