![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/glass_roof_instancing_wireframe-1024x598.png\")
![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/glass_roof_instancing-1024x597.png\")
![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/glass_roof_instancing1-1024x353.png\")
Houses<\/h4>\n\n\n\n
There are 21 variants of the houses in four categories – small, medium, wide and large. They were imported from a kitbash in Maya. I used VEX to categorize them and to create a variant attribute, used when copying the houses to an appropriately scaled lot. The lots were created using Chain SOP, which deformed a simple grid on a hexagonal curve. The scale of the houses copied was determined by hand using groups, however I imagine this could have easily been set up procedurally.<\/p>\n\n\n\n
![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/hex.png\")
Block variant<\/figcaption><\/figure><\/li> ![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/hexnode-1024x803.png\")
Block variant node setup<\/figcaption><\/figure><\/li> ![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/variantshex-1024x529.png\")
The result using multiple lots <\/figcaption><\/figure><\/li><\/ul>\n\n\n\n These lots were projected on the ground plane using Ray SOP, and cleaned up of pieces that contained less than four points per primitive.<\/p>\n\n\n\n
For randomizing which variant of the house from its respective category goes on its lot, I used this VEX snippet: <\/p>\n\n\n\n
i@variant = fit(rand(@ptnum *chf(\"Seed\")),0,1,0,6) ;<\/code><\/p><\/blockquote>\n\n\n\non the point groups I created earlier. This randomized the variant number, which the CopyToPoints SOP took as an input when instancing.<\/p>\n\n\n\n
![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/houseinstance.png\")
CopyToPoints SOP operation<\/figcaption><\/figure>\n\n\n\n ![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/render_test.png\")
An early render test of house instancing.<\/figcaption><\/figure>\n\n\n\n After a few iterations I was happy with the result.<\/p>\n\n\n\n
Trees<\/h4>\n\n\n\n
I used a similar approach when loading the trees and categorized them based on their size. The only difference is that I used the AttributePaint SOP to create a mask for instancing.<\/p>\n\n\n\n
![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/treemask.png\")
AttributePaint mask<\/figcaption><\/figure>\n\n\n\n ![\"\"](\"https:\/\/ben.stevuliak.net\/wp-content\/uploads\/2021\/02\/treescatter.png\")
Instanced trees<\/figcaption><\/figure>\n\n\n\n A VEX snippet I found myself using repeatedly while instancing:<\/p>\n\n\n\n
for (int i = 0; i < @numpt; i++) {
f@posy = @P.y; vector a = set(0,@posy,0);@N = normalize(a-@P);
}<\/code><\/p><\/blockquote>\n\n\n\nThis orients every point’s normal at X,Z origin. <\/p>\n","protected":false},"excerpt":{"rendered":"
In total, the scene I sent to the render farm consisted of approximately 215000 objects. Most of these were instances of houses, trees, the glass roof, windows and other models. I used SideFX Houdini to lay out the points, and then copied the instances to them. Glass roof The glass roof was the setting stone […]<\/p>\n","protected":false},"author":1,"featured_media":331,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,10],"tags":[18,14,12,17],"class_list":["post-320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3d-cr6001","category-yr3","tag-arnold","tag-cr6001","tag-escape-studios","tag-houdini","entry"],"_links":{"self":[{"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/posts\/320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/comments?post=320"}],"version-history":[{"count":3,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/posts\/320\/revisions"}],"predecessor-version":[{"id":333,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/posts\/320\/revisions\/333"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/media\/331"}],"wp:attachment":[{"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/media?parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/categories?post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ben.stevuliak.net\/index.php\/wp-json\/wp\/v2\/tags?post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}