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Messages - kmwhitt

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[C4D] General Discussion / Re: Projector Shader in Corona
« on: 2023-01-14, 23:27:27 »
Decals will not help me in adding grunge to a material where there are different types of mapping required.  Is C4D's projection shader supposed to work with Corona?  Thanks.

Maybe - thanks for the input.  Is this all maps (including normal) or just those out of Substance?

Stefan - thanks for the helpful reply.  I apologize for not responding earlier.  I thought I had ticked "notify" but not the case I guess.  I will take your suggestions and see what I can come up with.  Thanks!

[C4D] General Discussion / Projector Shader in Corona
« on: 2023-01-11, 20:19:21 »
Is the projector shader supposed to be working with the latest build of Corona?  I found a thread from 2020 but no follow up.  I am having mixed results.  Is there a better option via use of Corona shaders?  Thanks!

I hate to admit that I’ve been using Corona for C4D for several years now and I have yet to achieve any quality renderings.  I’ll spend hours changing materials, render settings, and post-production to no avail.  I always end up with a murky, gray, hazy result (example attached) – not the crisp clear images others are producing.  This is a link to the type of images I hope to produce:

To say the least, after so many years this is disheartening…

I am quite familiar with Corona as I’ve been using it for so long (obviously incorrectly).  I won’t need anyone to go through the basics.  I’ve also been a C4D user for almost 20 years, so I know my way around the software and am quite familiar with various rendering engines.  I was a Vray user prior to Corona and achieved the same subpar results.

It has only come to my attention recently that I can increase material values above 70% and that you’re in the “safety” zone if not exceeding 90%.  I’ve been using this 70% cap as I was taught incorrectly when Vray was first introduced to Cinema 4D.  To make matters worse the earlier versions of Vray for C4D were glitchy in the way materials and light were calculated – as some users may remember.

As our firm creates mostly kitchen and bath design, we work in inches.  I have often wondered if Corona isn’t converting the units correctly as some of the light settings need to be lowered substantially to avoid over-exposure.  An example would be having to set under cabinet lighting to 50 lumens or less in an LED strip span of 5’ which is not realistic or 25 watts of fill light blowing out the entire scene.  Further, none of the PBR materials I create in Substance look the same as they do in Substance.  I always must adjust glossiness/roughness and base color considerably.

Due to my suspicions of the units not converting correctly, I would at the very least appreciate someone trying the scene for themselves.  I will upload upon request.

I am looking for a C4D user who is capable of stunning results to tutor me.  I thought it would be a good idea to use the file from which the attached image was produced as an example scene – hopefully having someone walk through/dissect the scene and tell me where I’m going wrong.  I am willing to pay well for your time.  Please PM me if you’re interested.  I work from home so I can be flexible with the hours.  Thank you.

Thanks Cinemike.  Did not realize this was a known issues.  Kevin

[C4D] General Discussion / Making HDRi visible in viewport
« on: 2022-09-10, 14:47:45 »
I downloaded an HDRi from the Cosmos Browser to use in my scene.  How do I make the image visible in the viewport in order to position it correctly?  Note - I am still using S24  with Corona version 8.  Thanks!

Good suggestion.  Thanks!

Al - sorry for the late reply.  I'm not getting notifications for some reason.  The set up is simple.  I have several individual square tile objects with a multishader material assigned to each.  The multishader is comprised of three different marble bitmaps.  I don't see how the layer material can be of any use as the U and V bitmap position has been randomized for each tile.  This would make the grunge map erratic too.

Al - thanks for the reply.  I've been trying the decal over the multishader floor and Corona crashes.  How would this have been done prior to the introduction of decals?

I’ve got some individual floor tiles that I’ve texture using multishader.  I now want to add a consistent layer of grunge/dirt over the entire floor to add realism.  Keeping in mind that these are individual objects, what is the best way to achieve this?  Thanks in advance, Kevin

[C4D] General Discussion / Re: Diffuse Values Above 70%
« on: 2022-07-11, 16:23:27 »
Nejc - Thanks for the detailed explanation.  I guess I've been using Corona incorrectly in the past with my diffuse values too low.  The results I'm getting now are much better.

[C4D] General Discussion / Re: Diffuse Values Above 70%
« on: 2022-07-11, 16:21:07 »
Thanks Marcin.  Good read...

[C4D] General Discussion / Re: Diffuse Values Above 70%
« on: 2022-07-09, 23:36:42 »
Thanks Rom.  That is what's confusing to me.  I haven't used Corona in a couple years and now that I'm picking back up, I'm not sure if I have Cinema 4D setup correctly.  As I don't think you're a C4D user, I was hoping someone could advise on the C4D settings in the attached image.  Further, is there a calculator that exists somewhere to convert linear linear to sRGB?  I'm concerned that the value I'm using for white walls is too dark at 70%; however, not sure if I'm working with linear or sRGB in the first place.  If I am indeed working in sRGB that would explain why my white walls appear gray and it is necessary to ramp up the light settings to get decent light.  I'd really appreciate someone helping me understand this.  Thanks again, Kevin

[C4D] General Discussion / Re: Diffuse Values Above 70%
« on: 2022-07-09, 22:28:41 »
meant to say depending on who you're talking to...  not according!

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