preloading discplacement?

[gdamaso88]

does anyone know what preloading displacement mean? I've used a displacement map for a couple of textures and when I render it, it says "preloading displacement" in the rendering window, it then says "unloading geometry". This is the first time I've used grass as texture map vs. a displacement modifier on the geometry itself. I like the idea of the displacement map as texture, but this seems to slow my computer down a bit too.

Also, on a side note viz crashes when I try to rendering a large image (3600 x 2700)? Any ideas? I think its related to the geometry.

[Christopher Nichols]

Displacement geometry is created in the rendering and it done dynamically so, it is able to swap memory as it renders, creates, and unloads geometry as more ram is needed.

[gdamaso88]

so is there a way to avoid the large amounts of memory that this uses? and to keep it from crashing the program.

 

Is there is a difference between 2d landscape discplacement and 3d displacement? and is there a difference in applying it as a modifier vs. applying it as a texture?

 

I'm just trying to figure way around this to render a large image with the displacement I want.

 

Thanks for your reply Christopher

[Christopher Nichols]

yes there is a difference. As always... the docs are a good place to start:

 

http://www.spot3d.com/vray/help/150R1/displMod_params.htm

 

Also the 2D mapping method keeps the displacement map in a precompiled state in memory. Large displacement maps can take a lot of RAM. It may be more efficient to use 3D mapping in that case, since it can recycle the memory used for the displaced geometry.