Irradiance map and displacement

[werticus]

I've noticed that a finely detailed displacement can take 50 times longer to render if you use irradiance map.

I've had it come up on two scenes now, one a mini orb corrugated fence and the other a rammed earth wall with a 3000x8000 pixel displacement. (both 2d displacement.)

Both scenes were going to take over 60 hours to render with 6 machines and were getting stuck on these areas of the render on the final pass.

I eventually ended up figuring out what it was, and unchecking 'use irradiance' on their respective textures and now the scenes render in 2 hrs total and look a little better.

So now i just have to remember for the next job that if i have anything with fine detail and displacement to NOT use IR.

But, I thought you might like to know about the issue in case it is a bug.

[glorybound]

IRR, it seems so yesterday . I have been using BF+BF with all defaults. I noticed with the denoiser, I can drop my max subdivision from the default 24 to 8.

[Rens]

The 'static geometry' option in the VrayDisplacementMod might help here. It'll calculate the displacement before rendering.

[werticus]

We have too much work and not enough render power for BF + BF... the boss has no clue that paying people to surf the web while waiting for test images is a false economy... geezus, I can appreciate BF + LC but BF BF, madness! :P

I'll give the static geometry a try rens and post back in 15.

[glorybound]

We have too much work and not enough render power for BF + BF... the boss has no clue that paying people to surf the web while waiting for test images is a fast economy... geezus, I can appreciate BF + LC but BF BF, madness! :P I'll give the static geometry a try rens and post back in 15.

I have gotten spoiled with my new machine. It is awesome to render 4K-6K images, with all the bells and whistles, in around 35-40 minutes. The investment has already paid off. Pre new computer a 4K would have taken 3-4 hours and 6K was out of the question. But hey, if you get paid to surf the web, more power to you

[werticus]

The 'static geometry' option in the VrayDisplacementMod might help here. It'll calculate the displacement before rendering.

This option does not exist for 2d mode.