Corona 1.4 & Caustic

[cecofuli]

No, only Progressive support Absorption.

[Juraj]

So how can you composite a nice pool if the VCM will produce pool with caustics, but without absorbtion ? The water will not look that good with just one of these.

I tried overlaying just caustics using screen, but even this is not good solution since caustics cause illumination that I otherwise not have without them (non-caustic refraction looks different, not extremely but it's not it).

[cecofuli]

In the second image, I don't see any absorption...
In the first, the absorption looks like "painted by hand" =)

[gerets]

1) render with Progressive (water with absorption)
2) render with Bidirectional with simplified scene pool (water caustics)
3) compositing

[gerets]

obviously:



PS render VCM is fast (1 hour)

[gerets]

two simple tips but very important:

1) color diffuse material wall and floor pool similar at absorption color water material. This is important for compositing

2) simplified scene for caustic calcolation. This is important for render time with Bidirectional PPM

simple, fast and effective method




and anyway...love also no caustic water

[cecofuli]

Thanks Gerets for the tips.

[Mr.Schorsch]

These Images have by far one of the best greenery Setups i have ever seen. Such love in placing all to flowers and plant and Patels. Stunning work. And thanks for telling us the caustic Setup you used.

[tomislavn]

Your vegetation and details are absolutely amazing!! I am loving those images - it's such stunning work, really good job! Oh, and thank you for the tips :)

[Giona]

This is a really interesting thread!
I tried to create some caustics, but with my scene I was able to achieve a good results with different engine settings. Instead of PPM, I used Vertex Connection.

Here is the result:

[cecofuli]

Try to render the pool with a white shader.
 Now, it's difficult to see if there is something wrong.

[nicolasZ]

Wooo, so much interesting things !
Thanks  for the tips Gerets, and your images are awesome.

But I can't manage to reproduce the effect. I don't understand what I'm doing wrong ....
For the water did you used a plane with bump ? And what kinf of lighting did you used ?

Here are my settings, if you could tell me what is the problem, that would be great !

Thanks
 

[cecofuli]

Here the max file.

[nicolasZ]

You rock ! Thank a lot cecofuli !

[Giona]

Here's the test with a white material inside the pool.

I also tried another scene to see reflective caustics on the walls. I tested the scene with BDPM and Vertex connection, 4 min each scene and the results are almost the same.
It could be super usefull to have a render pass to save only caustics..