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Topics - dj_buckley

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1
I need help / Render Time Boolean - Distance Map Issue
« on: 2019-07-11, 16:28:15 »
See attached, I've some really complexed shapes/panels to make so was hoping this would work, but as you can see in the image, my booleans are 'hollow' is that makes sense.  I need the resulting borders to be bridged together so the red part still looks solid

The basic setup is the same as this, just without the 'inside colour' object as I want it all the same colour/material

https://corona-renderer.com/forum/index.php?topic=13210.0

2
I need help / Caustics Making things Darker
« on: 2019-06-11, 22:24:44 »
This isn't necessarily an issue relating to V4 (although I am using it), but I've noticed this previously too.

Can anyone explain why enabling refractive caustics (Caustics 'Slow' in the material), makes things appear a lot darker.

Screenshot attached with absorption colours and light strength exaggerated.  The only setting to change between the two screenshots is the Caustics being enabled in the water material.

Disabling 'cast shadows' in the object properties gives a completely different look again - although I know this isn't really a correct setup.

Just looking to understand why this happens so I can rectify it.

3
I need help / DR Hangs on Save before Render
« on: 2019-04-19, 14:31:41 »
So my scene file is pretty large - just over 4GB.

If I save it to the NAS it saves fine, takes less than a minute.  As soon as I press Render though, it does the autosave which I believe it needs for DR, and then hangs at this point?

Any ideas?  Are there any file size limitations with DR?

It's not memory issue

4
I need help / HDRI reflection strength
« on: 2019-02-26, 08:45:36 »
Can anyone with a bit of technical knowledge explain why some HDRI's are way too strong in reflections and some are way to dull.

For example, I often find getting the lighting/exposure right with PGSkies results in super bright reflections, but yesterday I was experimenting with the Poliigon HDRI's and found the opposite.  Once lighting and exposure looked correct, the reflections were incredibly dull?

5
I need help / Corona Bitmap - Real World Scale Display
« on: 2019-02-14, 23:17:33 »
Is it a known issue that Corona bitmap doesn't display textures correctly when real world scale is used inside the bitmap

6
Feature requests / Corona Bitmap - 'Keep old map as sub Map'
« on: 2019-02-08, 16:45:37 »
Is this possible, if I have a standard bitmap in a map slot, and then I decide I want to use the Corona Bitmap instead, it'd be nice if it allowed me to use the existing bitmap as a sub map, rather than automatically opening explorer and forcing me to navigate for the map again and then redialling in all my scaling/tiling settings.

7
I need help / DR Node Drops Out
« on: 2019-02-06, 21:42:19 »
So I've got one master pc and one dr node, i can be rendering happily using DR, then the next time I press render, the node doesn't connect.  If I press 'Search on LAN' it doesn't find the node.  This is then the case in every file I open.  The only way to get it back is to restart the Master PC.

The weird part is the fact that machines can still communicate with each other through the network.  I can remote login to them from each other, they can both access the network drives etc.

Any ideas - it happens randomly but very frequently

8
Confusing subject title I know, because I'm confused.

I'm trying to get a bump map working correctly.  It's a very fine grain pattern.

I'm finding if I leave the strength of the bump at 0.5 for example, I can increase/decrease the effect or how 'aggressive' it is just by adjusting the filter blur value.  So I find myself constantly tweaking bump strength and filter blur to achieve the desired look.  Admittedly the standard bump isn't great and I'm struggling to achieve what I want.  If I make the bump to strong it just scatters the light so much that the whole object just gets brighter.

If I use the Corona Bitmap blur, it seems quite unpredicatable.  I'm finding if I use the Corona Bitmap I have to increase the strength of the bump to get the same effect as not using the Corona Bitmap and a lower strength.

I'm going to render off some examples, but if anyone has a similar experiences or 'best practices' i'd be keen to hear them


9
What's up with the values in Corona, specifically directionality on lights/light materials.  If you gradually increase the value i.e. 0, 0.5, 1, 1.5 you get a nice gradual change of direction of the light.

BUT ... as soon as you get to around 4.5, 5 - the change is drastic.

As a side note, this also happens with the Vignetting in the Frame Buffer.

10
I need help / Occlude other lights
« on: 2019-01-15, 21:38:23 »
I'm currently getting a really strange effect, where it seems like my 'Occlude other lights' checkbox is working the wrong way round.

If I leave it unticked, i'm getting shadow from what appears to be the light cone, if I tick it, the light works as expected.

See screenshots - the lights are 3 disc lights next to each other with an IES file

11
I need help / 32 BIT EXR ISSUE
« on: 2018-11-22, 14:56:53 »
Having an issue currently where some of my saved EXR's aren't opening in Photoshop.  If I save them as 16 BIT Exr's they work fine?

12
I need help / Overexposed RawReflect
« on: 2018-11-15, 13:30:56 »
I'm not even sure this question makes any sense but ....

If my main render looks good in terms of lighting/exposure/materials/tonemapping BUT my Raw Reflect pass is horrendously overexposed - what (if anything) does that tell me about my lighting/exposure/materials?

13
I need help / Bump Converter Proper Usage
« on: 2018-11-14, 23:13:17 »
What is the correct way to use the bump converter in terms of the strength and blur values?

To change the strength do I use the Native Max value in the Maps rollout?

What about blur?  Do I do that in the bitmap or in the blur value of the bump converter?  For example I have a CG Source multitexture map in a bump converter in the bump slot.  In the multitexture I've specified a blur of 0.01 for my wooden boards.  If I leave the bump converter blur at 1 - what blur value is being applied to my textures?

14
I need help / Fireflies with HDRI
« on: 2018-10-02, 14:23:20 »
As the title suggest, I just can't seem to get rid of fireflies when using an HDRI - never had this issue before, seems to be a Corona 2 issue.  Using 1714 from Peter Guthrie.

The material isn't too reflective and blurring stuff isn't an option.

Anyone else experiencing the same thing - it's almost making HDRI's unusable for me on exteriors

15
So I left a huge render going over night.

Just came in this morning and it looks pretty noisy but it's stopped rendering.

I set it rendering with a noise limit of 3%.  And rendered with Corona 2 through DR.  One host, one node.

I've checked the stats tab and it reads 4.21% (3%).  So it appears the render has stopped once the node has reach 3%?

Seems odd?  Is this correct behaviour?

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