Render Lighting Problem

[Croweyes1121]

I want this file to render looking the same way it does in the "realistic" visual style and I'm having no luck.  Can anyone tell me what I'm doing wrong?  When I render, it winds up with really simplified lighting, and looking cartoonish.  The realistic visual style looks perfect.  I just want a render that reflects that look.  Thanks, guys!

Superman2.dwg

[Croweyes1121]

Anyone? 

[Cad64]

I've looked at your file and I'm a little confused because your model isn't really 3D. It's basically flat, so that's a little strange. I would have extruded the letters to create solid objects. But anyway, go into your material editor, in the "Streaks" material, and turn off self illumination. That should help your render look a bit more like the realistic visual style, but it renders pretty dark. You may need to add more lights around the logo to make it more evenly lit.

 

[Croweyes1121]

17 minutes ago, Cad64 said:

I've looked at your file and I'm a little confused because your model isn't really 3D. It's basically flat, so that's a little strange. I would have extruded the letters to create solid objects. But anyway, go into your material editor, in the "Streaks" material, and turn off self illumination. That should help your render look a bit more like the realistic visual style, but it renders pretty dark. You may need to add more lights around the logo to make it more evenly lit.

 

Thanks for the response.  Yeah, the super extreme angle wasn’t really intended per se, but it makes little difference when you look at it straight on, which is the only way I’ll be rendering it.  I’ll try turning off self-illumination and adding more lights and see if that helps.

Edited August 18, 2021 by Croweyes1121

[BIGAL]

You need this STSC_TextToGeometryBeta_5-2016.bundle its a text to pline etc and works great its by SEANT may have been updated, you can make 3d text this should help the problems. Have even done 3d text on curved surface. Hopefully this bundle helps.

 

C:/program files/autodesk/aplication plugins/STSC_TextToGeometryBeta_5-2016.bundle

 

STSC_TextToGeometryBeta_5-2016.bundle.zip

Edited August 19, 2021 by BIGAL

[Croweyes1121]

20 minutes ago, BIGAL said:

You need this STSC_TextToGeometryBeta_5-2016.bundle its a text to pline etc and works great its by SEANT may have been updated, you can make 3d text this should help the problems. Have even done 3d text on curved surface. Hopefully this bundle helps.

 

C:/program files/autodesk/aplication plugins/STSC_TextToGeometryBeta_5-2016.bundle

 

STSC_TextToGeometryBeta_5-2016.bundle.zip 236.97 kB · 0 downloads

Thank you.  Unfortunately, though, this is totally custom and can’t be done with actual text.  I have to do it all by hand.  It’s not a matter of the design.  It’s the inconsistent lighting I’m getting.  I’m doing an animation, and no matter how I export (PNG, PDF, etc), the lighting generates randomly and reflects off of the material differently in every frame, making the motion look terrible.  If I could trim the geometry and reexport, and have the lighting remain consistent, then it would be fine.  But it bounces around constantly.  I can even export the exact same image with no changes and get different lighting with each export.  Incredibly frustrating.

[BIGAL]

Its not text that is the point of the bundle explode the text to Autocad objects like lines  arcs pline etc. Can then extrude into a 3d shape. Maybe extruding with taper ? Done with texp,  pedit and extrude.

 

[Croweyes1121]

2 minutes ago, BIGAL said:

Its not text that is the point of the bundle explode the text to Autocad objects like lines  arcs pline etc. Can then extrude into a 3d shape. Maybe extruding with taper ? Done with texp,  pedit and extrude.

 

What I’m saying is, the design is not the problem at all.  That part is done.  The problem is how AutoCAD is LIGHTING the finished product inconsistently.

[lrm]

"What I’m saying is, the design is not the problem at all.  That part is done. "

 

You may be  satisfied with the "design" but the CAD model is not sufficient for use with the rendering capabilities of any 3D CAD system.  Rendering software assumes a 3D model that has surfaces. The surfaces do not have to define a solid object but they could be part of a solid model.  Rendering software uses the surface normals to determine how to color a portion of the surface. A simple form of rendering computes the angle between the surface normals and the direction to the light source and uses the cosine of this angle to determine the intensity of the surface color at that point.  In your 2D model all the surface normals are pointing in the same direction, perpendicular to the XY plane. In addition, the fronts of the letters that form the word "superman" do not include a surface.   Your 2D model provides a pseudo form of transparency via hatching.  A true 3D model is needed for transparency rendering.

 

If you really want to be able to generate a CAD rendering of the geometry I suggest you do the following.

1. Create a 3D model of "superman" by isolating the 2D geometry of the outline of the letters. 
2. Trace over each letter to make it composed of just lines, arcs, and splines.  The profiles of the curved portions of the letters could be greatly improved through the use of splines yielding a model that looks as good, if not better, and would also be much more efficient for rendering.  The current model is extremely bloated. 
3. Convert each letter to a region.  This step is not necessary but doing it will help to ensure that you have closed shapes for each letter.
4. Extrude the regions.
5. Rotate the object or change your viewpoint to as required to get the image you seek. It looks like you you want an axonometric projection (not perspective) for the final render so do not use a camera or a perspective view for rendering.
6. Assign a transparent material to the model.
7. You will need to experiment with the material finish to get the results you want.
8. It looks like you don't want shadows in your final render so turn those off.  I think one or two light sources may be sufficient.
9. Be careful of specular reflections.  This is a function of the location of the light source and the surface normal.  It can affect the appearance of surfaces as you look at the model from different angles. 

Good luck!