Fastest Iray Shaders to Render?

sarge74

I assume that some Iray shaders render faster than others. When rendering indoor scenes using old poser format rooms and furniture, would there be a simple Iray shader to apply to them that would help speed up the render? If I don't care about super photo real backround/rooms, is there a shader/material I could apply to the 3Delight surfaces that would help with long render times?

Any advice would be cool to here. Anything to help with long Iray renders, right? Thanks

Oso3D

The Iray Uber shader mutates to fit the settings. That is, if you don't use Translucency, the Translucency bricks (code blocks) are absent when the shader is sent to the engine (as far as I can figure out -- if you send your surface to the shader mixer, you will note that the bricks depend on what settings are active).

So, the fastest would simply be: use only the basic stuff (base color, glossy) and that's it.

 

sarge74

Thanks William. Appreciate the input. 

So does anyone have an Uber Shader Preset they find is the most basic/fastest to render?

AllenArt

sarge74_a2925befff said:

Thanks William. Appreciate the input. 

So does anyone have an Uber Shader Preset they find is the most basic/fastest to render?

Not really. Your best bet is just to avoid emissive, reflective, refractive and translucent or transparent surfaces. IOW, stick to duller, more diffuse surfaces ;).

Laurie

Oso3D

Note that with reflection default allows near infinite path of reflections. You can get great results dropping path (in render settings) as low as 5. Much below that and you can get weird 'black' shading in reflective/transparent stuff.

Normally it's set to -1, which is 'unlimited.'

nonesuch00

I got iRay renders to render orders of magnitude faster by locking Shutter Speed & F/Stop and dialing down Exposure Value to 1.0 at UHD resolution. You the have to adjust the brightness in Gimp or Photoshop and scale the image down to FHD or HD resolution.