3ds max 2017 Vray: render becomes pixelated suddenly

[Anonymous]

 I have been trying to render a scene for a while now and the scene turns out perfectly until it begins it's "prepass" phase and suddenly the entire picture becomes pixelated? I believe it's because of my v-ray render settings because it's happened in the past or because of a really stupid error, just very confused. Thanks.

[Anonymous]

 I have been trying to render a scene for a while now and the scene turns out perfectly until it begins it's "prepass" phase and suddenly the entire picture becomes pixelated? I believe it's because of my v-ray render settings because it's happened in the past or because of a really stupid error, just very confused. Thanks.

[Francisco_Penaloza · Accepted solution]

I would strongly recommend reading the help docs that comes with V Ray to understand why and how the system works.

Your 'problems' are samples, there are not enough samples to clean your scene.

Now from your video, it seems you are using VRay RT, this is a variation of V Ray engine to use your video cards as render hardware. But from your settings, you are forcing VRay RT to use only the CPU and this is sort of an oxymoron to use a Video card render but only using the CPU.

That's why I recommend taking a read to the help docs to understand how this system works.

A quick fix would be to use the 'classic' VRay advanced render and leave everything to default. it should render fine.

or if you are using VRay RT, leave defaults too and see how it goes from there.

Best luck.

[Francisco_Penaloza · Accepted solution]

I would strongly recommend reading the help docs that comes with V Ray to understand why and how the system works.

Your 'problems' are samples, there are not enough samples to clean your scene.

Now from your video, it seems you are using VRay RT, this is a variation of V Ray engine to use your video cards as render hardware. But from your settings, you are forcing VRay RT to use only the CPU and this is sort of an oxymoron to use a Video card render but only using the CPU.

That's why I recommend taking a read to the help docs to understand how this system works.

A quick fix would be to use the 'classic' VRay advanced render and leave everything to default. it should render fine.

or if you are using VRay RT, leave defaults too and see how it goes from there.

Best luck.

[Anonymous]

Ah thanks so much. I'll check the docs and hopefully I'll be able to fix it now.

[Anonymous]

Ah thanks so much. I'll check the docs and hopefully I'll be able to fix it now.

[Anonymous]

For anyone with the same problem, I read through a few forums and found I just needed to increase my max/min amount in the irradiance map settings. My minimum was -3 and max 0, and I just changed the max to 4. 

[Anonymous]

For anyone with the same problem, I read through a few forums and found I just needed to increase my max/min amount in the irradiance map settings. My minimum was -3 and max 0, and I just changed the max to 4. 

[Francisco_Penaloza · Accepted solution]

Without having more information of your scene, it is hard to really nail what was your problem, but I am almost sure it was not GI related. Irradiance mapping is a way to calculate GI, from your screen video it seems your problem was Antialiasing. You can tell by the jagged edges in the geometry when the GI is poor or not enough you get dark spots in your scene.

Also using 4 in the maximum is way exaggerated for that small scene.  

I would recommend to not just copy other people settings, reset everything to default and you should get easy better results.

By default VRay RT will use Brute force as first bounce and your image should look better.

[Francisco_Penaloza · Accepted solution]

Without having more information of your scene, it is hard to really nail what was your problem, but I am almost sure it was not GI related. Irradiance mapping is a way to calculate GI, from your screen video it seems your problem was Antialiasing. You can tell by the jagged edges in the geometry when the GI is poor or not enough you get dark spots in your scene.

Also using 4 in the maximum is way exaggerated for that small scene.  

I would recommend to not just copy other people settings, reset everything to default and you should get easy better results.

By default VRay RT will use Brute force as first bounce and your image should look better.

[Anonymous]

I realized after I posted that, 4 was not working at all so thank you. I believe I reset the settings instead, but I'll check on it soon if I still have some problems.

[Anonymous]

I realized after I posted that, 4 was not working at all so thank you. I believe I reset the settings instead, but I'll check on it soon if I still have some problems.