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Messages - jamieirvin

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1
[C4D] Resolved Bugs / Unable to 'hide' lights
« on: 2022-10-19, 13:59:49 »
Hi,

A small issue, but one I thought I would raise as it's nagging at me.

I am using Corona version 9 within C4D 2023 and I can no longer hide Corona lights using the 'traffic light' buttons. Standard Cinema lights work as expected, but Corona lights remain visible despite the display indicator being red.

To clarify, 'unticking' the light does turn it off, and is therefore not displayed in the viewport.  But if I require the emitter to be hidden in the viewport, yet the light remain active (ticked) then this doesn't work properly. 

It's no huge issue, but I like a 'clean' viewport :)


2
ah... I missed that note 😂

Thanks for the info and I'll keep that in mind! 👍🏼

3
As a side note, In all today's testing across numerous machines, we found that scenes saved in C4D R21 using Corona Version 6 wouldn't open in R21 using Corona Version 5. We would get the following error (see attached).

We have since updated the machines that run Version 5 to now run Version 6 and all the Cinema4D files now open just fine.  Again, this took a while to sort so I thought I'd mention it here as I am sure I won't be the only person that may come across this issue in the future.

In the interest of being thorough, we duplicated the Cinema installation on a machine so we could run two identical versions of the application in parallel.  We confirmed our above findings that scenes created in Corona Version 6 are not backwards compatible (at least with version 5).

I have no idea why this is the case... but I'm glad we have found the issue.

4
Hi,

I'm running Version: 5 hotfix 2 on one machine and version 6.0 on another. 

Which version now supports backplate?

(edit) I've just updated to Version 6 HF2 and the backplate issue still occurs. I've not tried Version 7 dailies ... yet

5
Hi all,

Thanks for your reply and thoughts on this.  It's been a real head-scratcher.  There's always something that gets the brain cells twitching on a normal day, but this has been a proper challenge!

We had a good idea that it wasn't related to phong, normals or generally related to the model geometry as it is all modelled from scratch within C4D and the error wasn't consistent with mesh errors due to the very rectangular and overlapping nature of the areas in question. 

However, when we shifted the camera and removed all the textures from the scene, the problem persisted. I eventually ended up collapsing the entire scene in to two meshes and removed all tags.  I was left with a bare mesh, a light and a camera.  And then I noticed it...!  When we prepare photo montages, we add a 'background' object as the child of the camera.  This has the backplate mapped on and in our default scene we have a Python Tag that controls the visibility and render-ability of the backplate. When the camera is used, the background becomes visible but, crucially, is not renderable (see attached). This a solid tried-and-tested way of working with numerous backplates in a single scene and something we use daily.  However, in this instance, the artist in question removed the Python Tag and the 'background' object 'traffic lights' were grey, so Corona was attempting to render it.  As far as I understand, the background object isn't supported / recognised by Corona and therefore it just became an annoying interference that made a right mess of the render output!

Anyway, to cut a long story short... we fixed the issue and will be keeping an eye on "Artist X' to make sure he doesn't ruin my day again.

Thanks again for your responses and apologies to the Corona Team for possibly insinuating that your beautiful software may be to blame... 😳

6
Hi,

My colleague has been rendering a scene recently and has noticed some sections of the image render 'differently'.  There are rectangular areas throughout the final image that look lighter than the rest of the image.  It's best described as looking like a number of areas have been region rendered for a while and then the regions were disabled whilst continuing the render, resulting in an image with overall noise of 10% and localised 'regions' at 4%.... However, no regions are active and the image was rendered over a period of 2 hours.

The scene has been stripped of any environment fog, trees, bushes, cars, people etc so it is light weight and the issue persists.  We have imported the geometry and lighting in to a new scene and used new render settings, yet the issue persists. It has also happened on a second, completely new scene model with all new lighting and render settings.  So it is not an isolated incident.

We are now testing the scene in other C4D version installations and on different machines to see what happens. 

However, I thought I would ask the question here as someone may have come across a similar issue before.  I'm hoping it is an easy fix and something we have simply overlooked...

Thanks

7
Right, it's just happened again and I am yet to interrupt it (see attached).

I am attempting to create a minidump file:

"How to generate minidump files?
Download and run this tiny application to obtain the minidump file:

Process Explorer

When the error message appears, or during the freeze, run the Process Explorer, find "CINEMA 4D.exe" process, select it, and go to Process > Create Dump > Create Minidump... then save the file in a desired location and upload it to us."


However, the above only applies to PC users and we use MacOS....

Any ideas?

8
Hi,

It's not scene specific, we have had it happen on a number of projects.  However, it does tend to be the 'heavier' ones so is unlikely on a relatively simple scenario.  It is also seems to be limited to small render regions the viewport, say, 5% of the image.  A larger region doesn't seem to attract the same crash.

This doesn't happen in the VFB using Corona's region render.  It only happens in the viewport when doing a quick test using Cinema's render region marquee.

When it freezes, it has only been when computing the secondary GI.   The timer will still run but the region will never render.  When we then click anywhere in the viewport or try 'esc' we get the spinning wheel and then have to force quit.

Next time it happens we will do our best to get a crash report.

9
Hi guys,

We have noticed that, when rendering a small region in the viewport, corona has a tendency to stall when computing the secondary GI.  It hangs indefinitely and any attempt to stop it causes C4D to freeze (spinning wheel of doom).  This means we have to force quit so no crash report....

This has only happened with the latest commercial V5 release / C4D R21 / MacOS on multiple machines.

Thanks

10
Gallery / Re: Chair and Fabric
« on: 2019-09-19, 16:24:22 »
oof... the colour and tone on that image are beautiful.  Love all the little 'hairs' on the blanket too... nice!!

11
Gallery / Re: FREE exercise scene in 3ds max and Corona
« on: 2019-09-19, 16:22:44 »
Hey,

So I am finally getting around to downloading your scene that your kindly posted and I'm going to give it a go myself when I get a few spare minutes between the chaos at work.  It's a great one to have a play with as there is a nice range of materials and intricate details to experiment on.

I saw your ballerina loft and that piece of work was fantastic.  I loved all the effort put in to create the smallest of details such as the shoes and the paint on the jar... It's a perfectionist's feast!  🤓

I'll send you the result of my efforts when I get an image done and it would be fun to do a challenge in the future as I rarely get the chance any more.  It's all work work work.... 🙄


12
Gallery / Re: FREE exercise scene in 3ds max and Corona
« on: 2019-08-14, 16:57:59 »
Hi,

I found this post via a recently-revived threat regarding forum politics and saw your post about your free scene not getting much attention/response. 

First I think you have done a nice job of recreating the original photo and this must have served as a great exercise in focussing on detail, lighting and texture work.  Given that the forum has a mixed user base, I would suggest providing an export option that can be used across a range of modelling packages (.obj, .FBX).  I use C4D and noticed there is only a Max file available.  This could broaden your audience and give others the opportunity to replicate the exercise you undertook, using your model as the starting point.

If you're open to feedback, there are a couple of aspects that, if tweaked, could bring you closer to the photo.  You seem to have done a great job on the modelling and the lighting is nice, however a few of the shaders could do with some attention just to bring them in line with the rest of the image. 

The white crockery seems over-bright... What is your diffuse white value?  There is almost no ambient occlusion between the plates for example.  It's appears as though the shader is allowing too much bounce light in these areas.  I would suggest setting your whites to 70%.

Your chrome material (tap) and metallic shader (buckets top-right) also appear to have a bright diffuse.  i normally suggest these be set to black (or close enough) and let the reflections to all the work.  Set the IOR to about 5-10 and you'll see a real depth in your reflections.   i also think the glossiness map on the buckets could be knocked back a bit to offer more subtlety in the reflections here. The buckets on the left are a lot more successful in my opinion

lastly, the glass shader appears to lack depth.  Try incorporating some very subtle volumetrics and maybe chuck in the new caustics solver... takes a wee bit longer but really pings glass to life. 

Anyway, that is my two-pennies worth and hope some of that helps, even just a bit. 

let me know if you decide to export an OBJ file, I'd love to have a play with this scene.  It's the perfect subject for a 'monthly render challenge'.  I used to run a twitter challenge with an untextured scene to see what people came back with for a bit of fun and practice.  Would be nice to do something like that again... it's been a while.

J
 

13
[C4D] General Discussion / Re: CORONA SCATTER
« on: 2019-08-14, 12:48:43 »
Gr100 - Are you serious ? If you want to work in the 3d industry you'll have to invest a lot of money in software and computers...It doesn't matter what package you use. Do you think that max\maya users pays less than us on computers and softwares ? If you want to spend as little as possible - go with blender


Money is not a problem my friend, we need softwares that work... Corona scatter ain’t the only problem with Corona.

It just sounds to me like someone needs to learn to optimise their workflow...

Multi-Instances do work (for me at least).  They don't work in IR but I have been using them perfectly well in the VFB.  There's a weird querk when using render Instances with motion blur, sending cloned AWOL but otherwise it's been fine.  We are a studio of 7 artists, producing 7-10 projects per week, with hundreds of thousands of clones, massive amounts of vegetation in some scenes and we manage just fine.  I can't applaud the Corona team enough.  We had been using Vray for the past 11 years and switched to Corona during the early Beta release.  Corona has revolutionised the way and speed at which we work. 

I regularly peruse the forum and there are a lot of people bitching about seemingly small issues... this is one of them. Corona Scatter would be a lovely addition to the tool set.  But we already have MoGraph Cloner and you could use Laubwerk SurfaceSpread...  Both work brilliantly and efficiently. 

If you're having trouble with viewport lag then that comes down to your workflow and scene optimisation.  There are two simple solutions to this problem that spring to mind:

1 - you could establish your cloners (trees, grass etc) and once happy with the result, save in a separate temp file, then re-import for render. This keeps your scene light and test rendering fast.
2 - Add all your cloner groups to a layer and then simply turn off visibility and disable generators in the layer manager. This will significantly improve your viewport frame rate.

I have a wish list as long as my arm for many software applications, but things take time.  However, we are currently in a place within the industry that is exciting and things are changing fast.  Applications are becoming more synchronised and complimentary, just look at the developments in UE4, Substance, Quixel, as well as with Corona... A lot has happened in the last 2 years and i am really excited about the developments ahead. 

14
Hi,

I'm trying to use the colour picker in the 'colour tint' function as per the explanation in the link below:

https://coronarenderer.freshdesk.com/support/solutions/articles/12000039650-how-to-set-automatic-white-balance-in-the-vfb-

When I select the regular colour picker it auto select black and won't actually let me select any pixels.  The inverse colour picker doesn't do anything at all. 

Colour pickers elsewhere in c4d work just fine though  🧐


15
anyone else have this crash in Corona4?:
C4D crashes when in interactive render, changing camera with frames in a stage object. So I have 20 cameras's, each on a next frame in a stage object (for sending to renderfarm). When interactive rendering on frame 1 switches to next frame, c4d crash every time...

I'm having similar issues.  Since the latest release I have had significantly more crashes. I have noticed that if i render using IR at e.g. 2000px, then stop the render and switch to final render settings and render in the vfb at any other size, then i get a crash.  It seems that any change in the size of the output causes a crash on render start. 

I'm yet to determine if this has a link to region render or not.  But it has only been happening since the final release of V4. 

Whilst I'm here, is there any plan to refine the region render behaviour so the 'marquee' doesn't reset on each render start?  It's REALLY frustrating.  It would be handy to have a tick option to keep the region active. 

Thanks

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